KUBERG CHALLENGER Electric Motorcycle Owner’s Manual

: June 5, 2024
: KUBERG

Table of Contents

CHALLENGER Electric Motorcycle
References
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CHALLENGER Electric Motorcycle

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OWNER’S MANUAL
ENGLISH

A word about this safety manual
DEAR KUBERG CUSTOMER
Congratulations on your purchase of a KUBERG Challenger. You now own a state of the art electric motorcycle that will give you endless thrills if you maintain it properly. We welcome you to the community of KUBERG riders.
Your KUBERG Challenger is a performance motorcycle that should be treated with caution and used in safe environments. The Challenger is highly adjustable and can be set up specifically for the rider. Please do not allow the motorcycle to be used or adjusted by other operators.
Your KUBERG Challenger is driven by a powerful electric motor, which requires experience and careful handling. The speed and torque settings MUST be set to suit the abilities of the rider. Please remember that even when the torque setting is set to a slow setting, the torque on these motors is virtually instant. This means that opening the throttle will propel the motorcycle to a rapid speed almost instantly. For developing good riding skills this is a wonderful feature, as it will teach riders throttle control gradually with lower power. If the maximum power and torque is set too aggressively, the rider may accelerate to a speed he/she is not comfortable with. Your Challenger has great capabilities and can grow with the skills of the rider to very high levels of performance, but it is important to start slow and speed up as you improve.
KUBERG motorcycles (except the KUBERG Freerider Street) are designed for off road use only and must not be used on public roads or sidewalks. Please check and obey all local and state laws. KUBERG motorcycles should only be ridden in safe areas where all laws are being followed and all required permissions are given.
KUBERG motorcycles are amazingly capable and can be used from the earliest stages of learning to ride all the way through to veteran riders. The secret of learning to ride well is to be able to ride a lot, and KUBERG motorcycles make this learning process very gratifying for teenagers and adults alike. Thanks again for purchasing a KUBERG motorcycle, and we hope you enjoy the ride!
Michal Kubanek President, KUBERG s.r.o.

KUBERG s.r.o. Zengrova 630/83 703 00 Ostrava Vitkovice Czech Republic www.kuberg.com

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Table of contents

A word about this safety manual Important symbols and terms Safety advice Electric drivetrain Safe riding practices Motorcycle overview Specifications 2021 KUBERG Challenger Before first ride Unpacking and assembly First setup Break-in period Motorcycle controls Setting up your KUBERG Challenger for riding Setting power & torque modes Drive train Adjusting chain tension Motor performance Weather effects on performance Maintenance Before each ride

3

Cleaning

19

6

Front wheel removal and installation

20

7

Rear wheel removal and installation

21

7

Front and rear brake adjustment

21

8

Brake squeal

22

10

Adjusting the suspension

22

11

Battery use, care and maintenance

24

12

Charging instructions

25

12

Battery removal and installation

26

13

Short term and long term storage

27

13

Battery disposal

27

14

Riding instructions & safety tips (beginner riders)

28

15

First ride (novice riders)

28

15

Learning to stand up

28

18

Correct riding technique

29

17

Protective equipment

30

17

Helmets

30

17

Clothing

30

18

Accessories

31

19

Limited warranty

32

Introduction
PLEASE READ THIS SAFETY INSTRUCTION MANUAL PRIOR TO OPERATION!
To ensure optimum performance from your new KUBERG motorcycle and to ensure safe operation, it is important to fully understand the features of the motorcycle. This manual contains IMPORTANT INFORMATION that every owner must fully understand. Please read this manual carefully and completely before operating your KUBERG motorcycle. Do not attempt to operate the motorcycle until you have attained adequate knowledge of its controls and operating properties and until you have received training in proper and safe riding techniques.
Motorcycles generally, as well as KUBERG electric motorcycles, are singletrack vehicles. The safe use and operation of such singletrack vehicles depend on proper riding techniques and the experience of their riders (operators).
Please read, understand and follow all Warning, Caution and Note notices on your KUBERG electric motorcycle and those included in this Manual. If you do not understand any of this important information, please contact your selling dealer/distributor or the KUBERG Customer Service Department (Email: kuberg@kuberg.com, phone: +420 608 757 353)
Prop 65 WARNING CALIFORNIA PROPOSITION 65 WARNING: accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Batteries also contain chemicals known to the State of California to cause cancer. Wash hands after handling.
Important symbols and terms
This Owner’s Manual uses the following symbols and terms to call your attention to Warnings, Cautions and Notes:
WARNING! A Warning indicates a potentially hazardous situation, which if not avoided, could result in bodily injury or death, in addition to the damage of the property. Read the text accompanying the warning to be aware of the specific hazard.
CAUTION! A Caution indicates a potentially hazardous situation, which if not avoided, may result in damage to equipment or an inadvertent system failure. Read the text accompanying the Caution to be aware of the specific hazard and to avoid damage or system failure.
NOTE: The text accompanying a Note provides helpful or other important related information.

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Safety advice
WARNING! Failure to obey all of the warnings & instructions contained in this manual may result in serious injury or death and/or permanent damage to your KUBERG motorcycle.
Speed & torque settings
Your KUBERG Challenger features a power and torque control button that must be set for the abilities of the rider. This must be set by the responsible supervising adult before each and every ride. Instructing and practicing in a controlled situation will allow the rider to learn how to operate the motorcycle safely. Go to page 16 to find detailed instructions on how to set up the different torque modes.
WARNING! ADULT SUPERVISION REQUIRED This vehicle must be used in the presence of adult supervision to ensure that safe riding practices are established and followed. Even though teenagers are of the recommended age to use this vehicle, not all teenagers have the strength, skills or judgment needed to operate this vehicle safely. Parents should permit continued use of this vehicle only if they determine that their child or teenager has the ability and judgment to operate the vehicle safely.
WARNING! OFFROAD USE ONLY KUBERG motorcycles are designed primarily for OFF- ROAD use. Please check your local, state and national regulations as to whether singletrack, motorized electric vehicles are legal for road use in your area. KUBERG Challenger is not homologated for road use in the European Union.
WARNING! This motorcycle is for personal use only and is not intended for commercial purposes. The use of this motorcycle for commercial purposes, such as rentals, will void all warranties.
Electric drivetrain
The fully electric drivetrain of this motorcycle is different from any gasoline motorcycle, in that: 1 There is very little engine braking and no engine noise. 2 When going into corners or coming to a stop the rider will be fully dependent
on the motorcycle brakes. 3 Passers-by may not hear you approach so extra caution should be taken.
Make yourself conspicuous in order to reduce the chance of other vehicle users or pedestrians being unaware of you approaching. 4 Be aware that your motorcycle is still ON when stopped and while at an “idle”. Accidentally twisting the throttle can cause serious harm.
WARNING! Accidentally twisting the throttle can cause serious harm.
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Safe riding practices
1 SINGLE OPERATOR ONLY! No passengers! 2 Long hair, loose clothing or items worn by the rider must be covered to prevent
entanglement in moving parts of the vehicle or the surroundings whilst riding 3 Do not exceed the weight limit. Heavier riders may significantly reduce performance
and/or render the vehicle unstable and/or over-tax the brakes and other control devices. Heavier riders may cause structural damage not covered by the warranty. 4 Do not touch any moving or hot parts. 5 DO NOT RIDE AT NIGHT OR UNDER LOW VISIBILITY CONDITIONS. The KUBERG Challenger is not equipped with lights. 6 Do not immerse this vehicle in water. 7 Do not ride on steep or uneven surfaces. Steep or uneven surfaces greatly increase the likelihood of loss-of-control. 8 Do not ride faster than the conditions permit for safe operation. Excess speed greatly increases the likelihood of loss-of-control. 9 The rider should have one leg on the foot peg ready to ride before turning the power switch on.
Ride where other motorists, pedestrians and cyclists can see you. Avoid riding in another motorist’s blind spot. Know your skills and limits. Stay within your limits in order to avoid an accident.
NOTE: Many motorcycle accidents are caused by rider error. A typical error made by motorcycle riders is veering wide on a turn due to EXCESSIVE SPEED or under cornering due to insufficient lean angle for the given speed.
WARNING! Maintain a proper posture while riding. The posture of the rider is important for proper control of the motorcycle. The rider should keep both hands on the handlebars and both feet on the foot pegs during operation in order to maintain control of the motorcycle. Never ride under the influence of alcohol or other drugs. Go to page 27 to find detailed instructions concerning proper riding technique.
One rider only
Your motorcycle was engineered to carry one rider and no (0) passengers. Carrying a passenger would overload the motorcycle and alter the handling. Do not allow this to happen.
Do not overload the motorcycle
Exceeding the weight limitations will adversely affect the handling of the motorcycle, and potentially cause damage.

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Obey all laws
Obey all laws. KUBERG bikes are for OFF-ROAD USE ONLY (except the KUBERG Freerider Street). KUBERG motorcycles cannot be used on public roads or sidewalks. The purchaser, owner, and/or riders of this motorcycle are directly responsible for ensuring that they obey all local, state, federal and national laws regarding the riding and use of this motorcycle.
Weather & riding conditions
Do not ride in the rain or snow. Please be aware that distance required to stop under wet conditions may be double or even triple the usual distance required under dry conditions. If riding in adverse weather conditions, ride more slowly and anticipate your stops by applying the brakes MUCH earlier. Do not allow young riders to ride on slopes that are too steep for their ability.
Night time
Do not ride after dark or in low light conditions.
Batteries
We have equipped your KUBERG Challenger with highly advanced lithium-ion batteries. Go to page 23 to learn about these batteries and the correct charging procedure.
Be aware of the motorcycle’s chain
Under no circumstances should hands or other body parts be close to a moving motorcycle chain. Riders should wear motorcycle boots without laces, and should not wear any loose clothing that could be caught by the chain.
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Motorcycle overview

2021 Kuberg Challenger
For teens and adults looking for serious acceleration, the powerful Challenger opens the door to a whole new riding experience.

1 Throttle 2 Handlebar 3 Steering column 4 Front brake 5 Rear brake 6 ON/OFF switch 7 Front fender 8 Tire 9 Front fork 10 Speed & torque control button

11 Foot pegs 12 Motor 13 Rear shock absorber 14 Chain tensioner 15 Charge port 16 Controller 17 Side panel/Battery cover 18 Chain guide 19 Frame protection cover

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3 15

1
2 9

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13

5

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12 11 14

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17 19

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Specifications Kuberg Challenger 24″ | 20″

Weight Power Batteries Controller Input standard Transmission Final drive Frame Wheelbase Seat height Handlebar height Front and rear brakes
Brake discs front / rear
Brake pads Front fork Rear shock absorber
Tires front / rear
Carrying capacity Colors

48 kg (105.7 lbs) | 42 kg (92.6 lbs) 12 or 8 kW, 48 V motor 16,8 Ah / 24 Ah extended, 48 V Lithium-Ion with BMS KUBERG BLDC PRO 110 V or 230 V Clutchless one speed 70T/10T | 55T/10T, chain 219H Aluminium Hydroformed Cradle frame 125 cm (49.2″) | 120 cm (47.2″) 106 cm (41.7″) | 100 cm (39.4″) Hydraulic Disc Brake System Tektro Orion 4P Hardened brake discs SBT 35 HRC 203/180 mm | 203/160 Sintered brake pads RST KILLAH 200 mm DNM Burner RCP-3 200 lbs 19″×2.75″ M / 16″x3.5″ M | 20″x2.5″ B / 14″x3.0″ M M – motorcycle tire, B – bicycle tire Maximum 220 lbs (100 kg), 1 person only Black w/ yellow

WARNING!
The KUBERG Challenger is designed to operate at 48 volts only. Use of any battery voltage other than 48 volts will result in motor failure. KUBERG Inc. considers modifications and/or changes to its electrical components to be a material alteration of its products, thereby voiding any warranties and/or guarantees in their entirety. KUBERG Inc. will not be responsible for any injuries, and/or death and/or other damage(s) caused by such modifications.

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Before first ride

NOTE:
If you purchased your KUBERG motorcycle at a local dealer, your motorcycle might already be fully adjusted and ready to ride. If you purchased your KUBERG motorcycle still in the original packaging, please carefully follow the instructions below and any supplemental instructions in order to complete the assembly and adjustment of your KUBERG motorcycle.

Unpacking and assembly
WARNING! Failure to properly assemble and adjust your motorcycle prior to use may result in an accident, resulting in death, serious injury and/or damage to property. If you are uncertain about any aspect of the assembly and adjustment of your motorcycle, seek help from a qualified mechanic or KUBERG Customer Service.

1 With the help of another person, carefully remove your KUBERG Challenger from the box.
2 Place the motorcycle on a solid and level surface onto a block or stand so that the rear wheel is off the ground.
3 Remove all the packing materials.
4 Using the Allen wrench #5 remove the front side of the stem, install the handlebars onto the stem and tighten all bolts crosswise (6 – 7 Nm).
5 Using the Allen wrench #8 loosen (clockwise) and remove front axle locking bolt (right hand side of the motorcycle).
6 Using the same wrench, loosen and slowly remove the axle from the disc side and spacers. Note the position and orientation of both spacers and that one spacer acts also as a disc guard.
7 Remove the transport insert from the front brake caliper. From this point, do not push the front brake lever until the assembly is done completely.
8 Check that the front hub spacer is coaxial with both bearings and insert the front wheel and both spacers carefully into the front fork. The brake disc must slide easily and gently between brake pads. Then slowly slide the axle into the front hub from the disc side and tighten it (first by hand clockwise, then to 12-15 Nm).
9 Re-insert and tighten the axle locking bolt anticlockwise (12 – 15 Nm).
10 Ensure the wheel is aligned correctly and the axle bolt is tight.
11 Spin the front wheel to ensure it is centered and spins freely. If not, follow the front brake adjustment on page 21.
12 Using the Allen wrench #4 adjust the brake lever positions to suit the rider (5 – 7 Nm).
13 Make sure the ON/OFF switch is in OFF position.

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14 Using the Allen wrench #3 loosen and remove 4 bolts on side panels (2 on each side) and slide these panels up to remove them.
15 Connect two main battery connectors (red to red and black to black) and the BMS (battery management system) cable (yellow).
16 Slide the side panels back and tighten all bolts (2 – 3 Nm).
WARNING! Incorrect connecting of the battery wires to the motorcycle terminals may cause irreparable damage to motorcycle electrical components.
First setup
1 Check the tire pressure of both tires and confirm that they are properly inflated. The optimal tire pressure for the KUBERG Challenger is 35 50 PSI (2.4 3.4 bar) for general use and should never exceed 50 PSI (3.4 bar).
2 Unpack the charger from its box and charge the batteries, being sure to follow the correct charging procedure. Go to page 26 to find detailed charging instructions.
3 Compress each brake lever. The lever should not compress completely to the handlebar. Each individual brake should hold the motorcycle securely when you push the motorcycle against the brake. If your brake needs adjustment, follow the instructions on page 21. All riders should be aware which lever operates which brake.
4 Check the chain for tightness and lubrication and if needed, follow the section Adjusting chain tension on page 17.
5 Set the power and torque settings to an adequate level for the rider’s experience and riding skills. Go to page 15 to find detailed instructions concerning how to set speed limits and different riding modes.
WARNING! There are no user serviceable elements incorporated into the motor, motor controller, batteries, battery charger, throttle, or wiring harness of your KUBERG electric motorcycle. DO NOT ATTEMPT TO DISASSEMBLE OR ADJUST ANY OF THESE COMPONENTS. Doing so may cause extensive damage to these components, will void your warranty, and may result in danger to persons and/or property. If you cannot resolve any problem using this owner’s manual, contact your KUBERG authorized dealer, or call the KUBERG Customer Service for assistance.
Break-in period
To assure future reliability and top-notch performance of your KUBERG Ranger, please pay extra attention during your first 150 km/93 miles or three full- charge cycles (whichever comes first). During this period please obey the following:
Avoid full-throttle starts and accelerate gradually. Avoid full speed riding and use the Beginner and the Sport mode only. Do not use the Race mode. Avoid hard braking. New brakes need some time to break in with moderate use.
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Motorcycle controls
Magnetic Kill Switch
The magnetic kill switch is located on the left hand side of the handlebars. Always switch the motorcycle into the OFF position when stopped or parked.
WARNING! If the power is turned ON and the throttle is open, the motorcycle will accelerate immediately. This is potentially very dangerous. The rider’s right hand should be used to switch the power on, with no hands on the throttle.
Speed & torque control button
The speed & torque control button allows a responsible adult to set motorcycle maximum power and torque. There are three distinct power & torque modes. Go to page 15 to read detailed instructions concerning how to set the various power & torque modes. Do not attempt to guess or assume these settings. Always check them before allowing the rider back on the motorcycle.
Charging port
When it’s time to recharge the motorcycle, the battery charger connector attaches to this port. Before attaching, ensure that the power is switched to the OFF position. Please refer to the battery and charging section (page 25) of this manual for more information.

WARNING! The power on the motorcycle must be switched OFF before attaching and plugging in the charger.
Charge indicator
The LED battery charge indicator is located on the right side of the fork upper plate. The LED illuminates green when the motorcycle is fully charged, yellow when the charge reaches 65% and red when the battery charge reaches 30%. The red light will start blinking when the battery charge is very low. From this point. the motorcycle will start losing power and will be able to travel roughly 2 – 3 km (1 – 2 miles) before the motorcycle shuts down completely.

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Setting up your Kuberg Challenger for riding
WARNING! Improper set-up is dangerous! It is your responsibility to set the motorcycle to the ability of the rider. Failure to do so, may result in injury or death, and/or damage to your motorcycle.
NOTE: A responsible adult must ensure that the KUBERG Challenger and its rider are prepared for every ride. The motorcycle must be set to the abilities of the rider, and the rider and the motorcycle must be supervised when ridden by a teenager. Novice riders can lose concentration quickly, and be easily distracted. If the power is set too high, an accident could occur. RIDE SAFE!
Setting power & torque modes
Follow these steps to limit the maximum power and torque on your KUBERG Challenger: 1 Turn OFF your motorcycle.
2 Press and hold the map button. The map button is located on the right side of the handlebars.
3 Turn ON your motorcycle. 4 The motorcycle will beep one, two or three times to indicate the desired power mode
1 beep – Beginner Mode (low-power) 2 beeps – Sport Mode (medium-power) 3 beeps – Race Mode (maximum-power)
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For example, if you want the medium power mode, hold the control button for two beeps and release. The motorcycle will confirm your selection with a double beep. 5 The power mode is now set. If you want to set a different power mode level, repeat the process from step 1.
CAUTION! Sport and Race modes should only be used by experienced riders!

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Drivetrain
Your KUBERG Challenger features a traditional chain and sprockets. It has a direct drive with no gears. The chain does not need to be adjusted on a regular basis, especially when the motorcycle is new.
However, it is important to check the chain before every ride and adjust it when necessary. There should be only a very little slack in the chain.
Adjusting chain tension
Follow these steps to adjust the chain tension: 1 Ensure the power is turned OFF. 2 Lift the motorcycle onto a block or stand so that both wheels are off the ground. 3 Using the Allen wrench #10 and the open wrench #24 loosen the rear axle nut. 4 Turn the adjustment eccentres evenly on both sides. Very small movements make a
big difference. Do not tighten the chain too much so that there is no slack at all. It should be taught’, nottight’. 5 Tighten the rear axle nut (78 – 80 Nm), check the sprocket and chain tensioner for tightness and ensure all bolts are tight. 6 When turning the rear wheel by hand, lubricate the chain with the off-road motorcycle chain lube spray. 7 Spin the rear wheel by hand at least 10 times more around and wait a few minutes for a spray to dry off. 8 Remove the excess lubricant using a cloth. If the wheel does not spin freely, go to page 21 and follow the brake adjustment instructions. 9 Check once more the rear wheel for alignment and the chain for tension.
WARNING! Failure to maintain and adjust the chain and align the wheel correctly could result in the chain jumping off the sprockets, causing a potentially dangerous and damaging situation.
Motor performance
The KUBERG Challenger has multiple sensors and control software to prevent the batteries, the motor and the controller from overheating. Once the temperature of batteries, motor or controller reaches a high temperature, the motorcycle power will be
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limited to 70% until the components are able to cool down. If the motorcycle continues to overheat, the controller will shut off the motorcycle until the components have cooled. This takes approximately 15 to 30 minutes.
Thermal shutdown of the motor can occur when riding in situations that stress the motor for a long period of time, such as long up-hills or continuous full throttle operation with no rest period for the motor or dirt on the motor cooling ribs. For the best riding experience keep your motorcycle clean.
Weather effects on performance
Very cold weather (-10°C / 14°F and lower) is hard on the motorcycle’s batteries and, as a result, the battery charge will not last as long as at temperatures around 20°C / 68°F. This is normal and does not require maintenance or servicing.

Maintenance
KUBERG motorcycles generally require significantly less maintenance compared to traditional gas motorcycles due to having very few moving parts, no gas engine and no exhaust. Our authorized dealers have extensive experience and know KUBERG vehicles inside and out, so they can provide high-quality service for your KUBERG motorcycle. However, service at a dealer is not required to maintain your warranty.
WARNING! PROPER MAINTENANCE OF THIS VEHICLE IS REQUIRED Failure to maintain this vehicle in proper operating condition may lead to an accident resulting in death or serious injury, and/or damage to property. If you have any questions about the proper care and maintenance of this vehicle, consult your selling dealer/ distributor or contact KUBERG Customer Service (kuberg@kuberg.com, +420 608 757 353.

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Before each ride
1 Make sure that all bolts and nuts are fastened securely and that the tires are properly inflated.
2 Check that the throttle and brake controls are operating freely.
3 Check the chain and if needed, go to page 17 and follow these steps to adjust its tension.
4 Lubricate the chain with the dry motorcycle chain lube spray, spin the rear wheel by hand at least 10 times around and remove the excess lubricant using a cloth. If the wheel does not spin freely, go to page 21 and follow the brake adjustment instructions.
This vehicle should be returned for periodic maintenance to your selling dealer AT LEAST once per year, but more frequently if used under severe or heavy use conditions. The service log is located at the end of this manual and required when servicing the motorcycle.
Keep your KUBERG Challenger clean and dry. Regularly check all components for tightness and adjustment, including handlebars, levers, axles, chain and brakes. Check the settings for torque and maximum speed. Check the tires for damage and for proper inflation.
Cleaning
Cleaning and maintaining your Challenger correctly will provide more enjoyable ownership and riding experience. By hand cleaning the motorcycle, you can simultaneously inspect all of the components. While the motorcycle components are waterproof, be careful when washing the motorcycle around the electrical components, especially the charge port, controller, battery, motor and a throttle. Do not disassemble the motorcycle in any way before washing. You are free to wash your Challenger with a low pressure water hose with clean water.
After cleaning:
1 Lubricate the front fork gliders with an appropriate amount of specialized fork lubricant spray and remove the excess lubricant using a cloth.
2 Lubricate the chain with the off road motorcycle chain lube spray, spin the rear wheel by hand at least 10 times around and wait a few minutes for a spray to dry off.
3 Remove the excess lubricant from both chains using a cloth.
WARNING! Do not disassemble the motorcycle in any way before washing. Using a power wash is NOT ALLOWED! Do not use cleaners with added salt as it often consists of a lot of phosphates that can harm the paint and the electronics. Do not use engine cleaners or solvents.
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WARNING! Do not operate your KUBERG Challenger if any damage is apparent. Immediately contact your local retailer/distributor or KUBERG Customer Service.
WARNING! There are no user serviceable elements incorporated into the motor, motor controller, batteries, battery charger, throttle or wiring harness of your KUBERG electric motorcycle.
DO NOT ATTEMPT TO DISASSEMBLE OR ADJUST ANY OF THESE COMPONENTS. Doing so may cause extensive damage to these components, will void your warranty, and may result in danger to persons and/or property. If you cannot resolve any problem using this owner’s manual, contact your KUBERG authorized dealer, or call the KUBERG Customer Service for assistance.
Front wheel removal and installation
1 Make sure the power is switched OFF. 2 Lift the motorcycle onto a block or stand so that both wheels are off the ground. 3 Using the Allen wrench #8 loosen (clockwise) and remove front axle locking bolt (right
hand side of the motorcycle). 4 Using the same wrench loosen and while holding the wheel, slowly remove the axle
from the dics side and spacers. Note the position and orientation of both spacers and that one spacer acts also as a disc guard. 5 Lower the wheel carefully away from the front fork.

6 To reinstall the wheel, check that the front hub spacer is coaxial with both bearings and insert the front wheel and both spacers carefully into the front fork. The brake disc must slide easily and gently between brake pads. Then slowly slide the axle into the front hub from the disc side and tighten it (first by hand clockwise, then to 12-15 Nm).
7 Reinsert and tighten the axle locking bolt anticlockwise (12 – 15 Nm).
8 Ensure the wheel is aligned correctly and the axle bolt is tight.
9 Spin the front wheel to ensure it is centered and spins freely. If not, follow the front brake adjustment on page 21.

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Rear wheel removal and installation
1 Make sure the power is switched OFF. 2 Lift the motorcycle onto a block or stand so that both wheels are off the ground. 3 Using the Allen wrench #5 loosen and remove 2 upper bolts from the chain guide and
remove it from the rear swing arm. 4 Using the Allen wrench #10 and the open wrench #24 loosen and remove the rear
axle nut. Don’t remove the rear axle yet. 5 Move the rear axle and both chain eccentres a few millimeters aside to the point
where the wheel can be pushed forward and the chain can slip off to the outer side of the sprocket.
6 While holding the wheel, slowly remove the rear axle and spacers on both sides. 7 Pull the wheel carefully back to remove it. 8 To re-install the wheel, reverse the above procedure and ensure the wheel is aligned
correctly and the axle nut is tightened properly. (78 – 80 Nm). 9 Spin the rear wheel to ensure it is centered and spins freely. If not, go to the bottom
of this page and follow the brake adjustment instructions.
Front and rear brake adjustment
1 Check whether the brake disk and the brake pads are not worn-out and don’t need a replacement.
2 Using the Allen wrench #5, loosen the two brake caliper bolts. 3 Pull and hold the corresponding brake lever firmly for the caliper to get centered with
the brake disc and re-tighten the caliper fixing bolts (9,5 – 10,5 Nm), then release the brake lever. 4 Test the brake by pulling hard on the lever a number of times. 5 If the wheel does not spin freely with the brake lever released, the caliper position itself needs to be fine adjusted again repeating the steps 1 to 3. Remember that the new brake pads are thicker and need to break-in first.
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Brake squeal
Dirt and humidity can cause noisy or squealing brakes. These are normally temporary and should gradually disappear with regular use. Repair is not required. If you hear a metallic “screeching” sound, you might need to replace the brake pads. Visit your KUBERG dealer to replace the brake pads.
Adjusting the suspension
The KUBERG Challenger features both front and rear suspension.
Front suspension
The front suspension on your KUBERG Challenger is adjustable, the RST KILLAH front fork has settings for damping.

RST KILLAH quick set-up guide
1 Rotate the blue adjuster, located on the fork upper plate, to change the amount of compression damping to the lockout.
2 Rotate the red rebound adjuster, located on the bottom of the right fork, as indicated on the sticker, to adjust the rebound to faster or slower.
Rear suspension
Your KUBERG Challenger is equipped with a single coil spring and a DNM Burner RCP-3 shock. For a harder/stiffer ride at the rear, tighten the adjustment ring in a clockwise direction. For a softer ride, loosen the adjuster by turning anti-clockwise.

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Battery use, care and maintenance
For the proper use, maintenance and storage of the battery, it is critically important that you follow and understand the instructions in this manual.
If you have any questions about the battery or its usage, please do not hesitate to contact the KUBERG Customer Service Department.
WARNING! Failure to properly use, charge and store this battery will void the warranty and may cause danger or damage. DO NOT use this battery with any other vehicle or appliance. Use of this battery with any other product will void the warranty and may create a hazardous situation that may cause a fire resulting in severe injury or death, and/or damage to property.
NOTE: The battery has an advanced battery management system (BMS) watching over cell-voltages, currents, temperatures etc. If any error on the battery module occurs, the BMS will keep the motorcycle safe. However, you must always park your KUBERG Challenger away from any flammable objects
CAUTION! Minimum distance between the parked vehicle and any flammable object must be at least 3 meters (10ft.)
WARNING! NEVER SHORT CIRCUIT THE DISCHARGE TERMINALS OF THE BATTERY. A short circuit will damage the battery and may cause a fire resulting in severe injury or death, and/or damage to property.
WARNING! Never mechanically manipulate the battery, never open the battery pack and do not puncture the battery cover or the battery itself.
CAUTION! Keep the battery away from excessive heat and/or open flames. Avoid long term exposure to direct rays from the sun.
CAUTION! Protect the battery from water or other moisture. If the battery becomes wet from rain during use, dry as soon as possible. Remove the battery from the motorcycle before washing.
CAUTION! To avoid damage to the battery, never expose it to intense physical shock or severe vibration.

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Charging instructions – Kuberg Challenger
Always follow these steps when charging your KUBERG Challenger: 1 Make sure your KUBERG Challenger is turned OFF.
2 Connect your charger to an electrical outlet (AC) 110 V or 230 V.
3 Turn on the power switch on the charger.
4 Wait for 30 seconds. 5 Connect the charger cable to the battery connector on your motorcycle.
CAUTION! If the charger is plugged into the motorcycle with the charger switched OFF, a potential in-rush of electrical current from the motorcycle battery to the charger may damage the charger.
The recommended charging time for a fully discharged battery is 1.5 hours, respectively 3 hours for the bigger 24 Ah battery pack. After 1.25 hours of charging, respectively 2.5 hours of charging the battery should be charged to about 80 %
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WARNING! Only use the supplied battery charger. Using any other battery charger will void the warranty and may damage the battery.
The LED light on the charger will illuminate RED while charging. The LED light on the charger will illuminate GREEN when the battery is fully charged.
CAUTION! The battery charger supplied with your KUBERG Challenger is for INDOOR use only.
Important notes about battery charging
WARNING! Do not cover the charger or its fan while charging, this can cause the charger to overheat and may damage the charger and/or the motorcycle electrical components. Avoid any contact with water or other fluids while charging the battery. If the battery, charger or any connections become wet, immediately unplug the charger and thoroughly dry all components. Only charge under the constant supervision of an adult. Children must not operate the charger. Keep the charger and the motorcycle at least 3 m (10 ft) away from flammable items and direct sunlight during charging. Never dismantle or disassemble the supplied charger. Never use the supplied charger for any purpose other than charging a KUBERG Challenger motorcycle.

Battery removal and installation
During normal use, KUBERG does not recommend removing the batteries from the KUBERG Challenger. If you need to replace the battery or remove it, KUBERG highly recommends taking the motorcycle to a certified technician or a KUBERG dealer. If you choose to remove or replace the battery yourself, please follow the following instructions carefully:
1 Ensure the power switch is in OFF position.
2 Stabilize the motorcycle using an additional stand on the rear wheel (sold separately).
3 Using the Allen wrench #3 loosen and remove 2 bolts on the right side panel and gently slide this panel up to remove it.
4 Unplug the battery connectors, one at a time. Note the direction and position of the battery and the terminal for each wire. When it comes time to reconnect, each wire must be connected to the correct terminal.
5 With the Allen wrench #5 loosen and remove 1 remaining bolt holding the battery in the frame.
6 Push the remaining positive and negative wires to the front and sides of the motorcycle, so the battery pack can be carefully pulled out.

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7 With the help of other person gently remove the battery out from the frame. Be extra careful to the wires and connectors.
8 To install the battery, reverse the procedure above and ensure all connectors are secured and all bolts are tightened properly. Tightening torque for the battery bolt (removed during step 6) is 9,5 – 10,5 Nm, for side panel bolts use 2 – 3 Nm.
WARNING! Incorrect connecting the battery wires to motorcycle terminals may cause irreparable damage to motorcycle electrical components.
Short term and long term storage
If you do not plan to use your Challenger for an extended period of time (2 weeks or more), disconnect the battery from the controller, also disconnect it from the charger and keep your battery pack at 50 – 60% of its capacity (48,3 – 49,6 Volts). Store the motorcycle in a dry and cool place at temperatures between 5 – 15°C (41 – 59°F). The battery MUST be stored in a place that is NOT warm. It is not advised to place the battery in a freezer, since the battery voltage would sag badly. If you decide to remove the battery and store it in a cooling box, please wait until the battery warms to room temperature prior to the reinstallation of the battery back into the motorcycle.
WARNING! Our motorcycles can be stored indoors only if the battery is physically disconnected. Keep the motorcycle and the battery away from excessive heat and/or open flames. Avoid long term exposure to direct rays from the sun. Keep the charger, the battery and the motorcycle at least 3 m (10 ft) away from flammable items and direct sunlight during charging and/or storage. If you have any questions about the batteries or their usage, please do not hesitate to contact the KUBERG Customer Service (kuberg@kuberg.com).
Battery disposal
We are confident that you will enjoy many kilometers or miles of thrilling riding with your KUBERG motorcycle. But, batteries can eventually wear out. When this happens, we urge you to properly dispose of your used batteries. For guidance regarding proper disposal of your batteries, please contact the KUBERG Customer Service (kuberg@kuberg.com). Also, you can find useful information regarding used battery drop-off sites from the Rechargeable Battery Recycling Corporation (RBRC) at www.rbrc.org.
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Riding instructions & safety tips (novice riders)
With the motorcycle set up correctly, your KUBERG Challenger is ready to ride! For novice riders, please follow these tips and instructions. The riders will get the most enjoyment if they feel safe and in control. Do not be tempted to start the rides too quickly. Make sure the speed and power settings are set slow to begin with. For the first time riders, this should be near the walking pace.
First ride (novice riders)
Stand astride the motorcycle and locate the controls while the motorcycle is switched OFF. After you understand the controls and are comfortable with them, it’s time for the first ride. For this, make sure you are dressed correctly in suitable safety gear. Boots, gloves, helmet and eye protection are necessary. The area for riding must be flat, open and safe, with no obstacles of any kind. The motorcycle must be set up correctly, with the speed and torque tuned to a slow setting.
1 Ensure the power is turned OFF.
2 Stand astride the motorcycle, keep your feet on the ground and move the motorcycle from side to side, forward and back, to get comfortable with the handlebar position and weight distribution.
3 Switch the motorcycle ON by switching the power switch to the ON position (magnetic kill switch).
4 Before twisting the throttle, you should have one foot on the ground and the other one on the corresponding foot peg.
5 Twist the throttle smoothly and slowly and set off.
6 Once comfortable, lift both your feet onto the foot pegs as you ride.
7 Once stopped, set the power switch to the OFF position by unplugging the magnetic kill switch.
Learning to stand up
Once the basics are mastered, the speed and torque settings can be switched to faster and more powerful settings, step by step, to match the improving skills of the rider. Before you get going too quickly, it’s a good idea to learn to ride the motorcycle correctly’. This means changing the riding position and in control. Learning to change the riding position is difficult if a rider does not have good throttle control. While the speed setting is set to low, the rider must learn to rotate his/her wristaround’ the throttle so that when he/she moves forward or backwards, the wrist is in the correct position. As the power and torque settings get higher, the `dead-zone’ in the throttle diminishes, so it becomes easier to stand up and work the throttle.

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Correct riding technique
Learning the correct riding techniques will prepare the rider for all forms of riding that come later. The rider needs to learn to control the motorcycle at slow speeds and use the correct technique to execute tight turns. The natural approach of many riders is to turn the handlebars but this is not a correct riding technique. The correct technique is to lean and use so-called counter- steering. Counter-steering is turning the handlebars in the opposite direction as the rear wheel intends to travel outwards of the corner (over-steering). This will cause the motorcycle to lean and turn in the desired direction. Counter-steering needs to be taught slowly and smoothly, sudden movements of the handlebars may cause an accident. If tight turns are mastered correctly, many other skills will follow naturally.
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Protective equipment
Always follow these instructions for protective equipment for every ride in order to limit the risk of injury in case of an accident. The KUBERG Challenger is intended for OFF ROAD use and therefore there is a high likelihood of dirt and other debris being thrown into the air, which presents a risk of injury. Also, there is a high possibility of an accident or a fall. The rider should use and wear: 1 A high quality helmet approved by your country’s governing body 2 A helmet face-shield or goggles 3 Protective clothing that covers rider’s legs, ankles, torso and arms 4 Wrist, knee and elbow protection 5 Solid motorcycle boots 6 Gloves made from tear resistant materials (leather or kevlar) 7 Motorcycle jacket made from tear resistant materials (leather or kevlar) 8 Clothing that is brightly colored so other vehicle users and pedestrians can see you
WARNING! THE RIDER MUST WEAR PROTECTIVE EQUIPMENT, ESPECIALLY HELMET, BOOTS AND EYE PROTECTION.
Helmets
There is no single factor that works best for reducing the severity of injuries sustained in accidents more than a quality helmet. Don’t ever allow your KUBERG motorcycle to be ridden without a helmet.
Clothing
Motorcycle leathers and padded protection for knees, back and arms can prevent abrasion injuries in the event of a fall. Failure to use appropriate safety equipment greatly increases the likelihood of death or serious injury in the event of an accident.
Never wear loose-fitting clothes as these may catch on wheels, chains, control levers or footrests. Do not wear shoes or boots with laces as these can get caught in motorcycle’s chain or wheels and result in serious injury.

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Accessories
Adding accessories or cargo to your KUBERG motorcycle can negatively affect its stability and handling. To avoid the risk of an accident, use extreme caution when adding accessories or cargo to your KUBERG motorcycle. Use additional care when riding with added accessories or cargo.
CAUTION! The total weight of the rider, accessories and cargo must not exceed the maximum load limit 100 kg (220 lbs).
WARNING! Never attach any large or heavy items to the handlebar, front fork, or front fender. Genuine KUBERG accessories have been specifically designed for use on this motorcycle. Since KUBERG cannot test all other accessories that may be available, you are personally responsible for the proper selection, installation and use of non-KUBERG accessories. Use extreme caution when selecting and installing any accessories.
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Limited warranty
Kuberg motorcycles are warranted to the original retail purchaser to be free from defects in materials and workmanship in the frame and components except for batteries, tires, and inner tubes for a period of thirty (30) days from the date of purchase. An upgrade to a three (3) month Limited Warranty is available to the original retail purchaser who registers his/her motorcycle via the registration form on www.kuberg.com/bike-registration within thirty (30) days from the date of purchase. A further optional Extended Warranty is available for a fee.
Warranty is valid for 3 months from the purchase date of the motorcycle via a Kuberg dealership. Warranty is nontransferable. All warranties are voided upon secondhand resales.
Batteries are warranted to the original retail purchaser to be free from defects in materials and workmanship for the first 300 charging cycles where they have to keep more than 80% of their initial capacity, provided charging, maintenance and storage instructions are properly followed.
Tires and tubes are warranted to be free of manufacturing and material defects for thirty (30) days. Such tire and tube warranty shall not include flat tires, tire cuts, skid through, over-inflation blowouts, or other such misuse or normal hazards.
Warranties are limited to repair and/or replacement of motorcycle and/or parts found by Kuberg to be defective, at the sole discretion of Kuberg. Kuberg Limited/Extended Warranty does not cover or apply to the following:
– normal wear and tear
– damage, failure and/or loss caused by accident, shipping, misuse, or neglect
– damage due to improper transportation
– exceeding the weight limit of the vehicle
– use by the operator not specified in the age range vehicle was designed for
– abuse and/or failure to follow instructions or warnings as stated in the applicable owner’s manual or other printed materials provided with the product
– damage, failure and/or loss caused by the use of the product for stunt riding, ramp jumping, speed competition, inappropriate off-road use, acrobatics, trick riding or other similar activities, or in any other manner for which such products were not specifically designed
This warranty does not apply to any products or components, mechanical and/or electrical, which have in any way been altered from their original configuration by any person. Kuberg will not be liable and/or responsible for any damage, failure or loss caused by any unauthorized service or use of unauthorized parts. Warranties do not cover or apply to any Kuberg product used for rental or commercial purposes unless the specific product is designated, labeled, or marketed by Kuberg as acceptable for rental or commercial use.
All warranty claims must be made directly to the original selling retailer. The selling retailer is the primary provider of warranty support and customer service. Kuberg may choose to perform warranty service at the sole discretion of Kuberg. The original owner of the product must provide proof of purchase prior to the approval of any warranty claim.
Under no circumstances do our warranties include any costs associated with the shipment and/or transportation to or from retailer, distributor or Kuberg. Kuberg, at its sole discretion, has the option of replacing with a new part, a factory recertified part, or repairing any defective product and/or component thereof, or to pay to the owner of such product an amount equal to the original purchase price of such product.
The original owner shall pay for all costs of labor associated with any warranty claims. This warranty supersedes all previous warranties. The warranties stated herein are in lieu of and expressly exclude all other warranties not expressly set forth herein, whether expressed or implied by law or otherwise, including, but not limited to, any warranties for merchantability and/or fitness for any particular purpose. Kuberg shall in no event be liable or responsible for incidental or consequential losses, damages or expenses in connection with their electric dirt motorcycle products. The liability of Kuberg hereunder is expressly limited to the replacement of goods complying with this warranty or at the sole election of Kuberg to the repayment of an amount equivalent to the purchase price of the product in question. CAUTION! Some states may not permit the exclusion or limitation of consequential damages and therefore, such limitations may not apply to the consumer in which such impermissible exclusions are involved.
The Customer’s Responsibility under the warranty shall be to:
– Operate and maintain the motorcycle as specified in the appropriate Owner’s Manual
– Give notice to an authorized Kuberg dealer of any and all apparent defects within ten (10) days after discovery, and make the machine available at the time for inspection and repairs at the dealer’s place of business.
Contact information on the back of this manual.

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Kuberg Motorcycle Service Log
Kuberg motorcycles are designed for extreme riding conditions which can cause a lot of stress to the bike’s components. Because of this, Kuberg warranties require scheduled maintenance at 3, 6, and 12 months in order to maintain optimal performance.
Please keep this service log in your records to present to your dealer at each service visit.

Recommended services

3RD MONTH

DATE

DEALER

NOTES (DESCRIPTION OF SERVICES PERFORMED AND PARTS REPLACED)

SIGNATURE

6TH MONTH

DATE

DEALER

NOTES (DESCRIPTION OF SERVICES PERFORMED AND PARTS REPLACED)

SIGNATURE

12TH MONTH