Destroyer 750S Wicked Thumb Electrocycle Instruction Manual
- June 17, 2024
- WICKED THUMB
Table of Contents
- Destroyer 750S Wicked Thumb Electrocycle
- In the box:
- Install Front Wheel
- Install Head Light
- Install Pedals
- Insert and Adjust Saddle Height
- Charge Battery before Your First Ride
- Battery ON/OFF switch
- Tips to extend battery life
- Uninstall & Install Battery
- Head Light Control
- Setting your Display
- APPENDIX A
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Instruction Manual
Destroyer 750/ 750S / BLVD
Assembly Manual UPDATED 1/23
Destroyer 750S Wicked Thumb Electrocycle
Welcome to the Wicked Thumb Army and congratulations on taking ownership of
your new Destroyer 750!!
Over the next dozen or so pages we will go over everything you need to know to
get your bike uncrated, assembled and ready for it’s maiden voyage.
Your safety is our number one priority. As such, if at any point during the
assembly (including right now!), if you are unsure of your ability to assemble
the bike in a safe fashion, we strongly suggest taking it to your local bike
shop, where they will be able to safely complete the process, while also
checking for anything that may have loosened up during transit and tuning
specific sytems to your riding ability and preference.
Before continuing any further, if there is any severe damage to the outside of
the carton, please take pictures before removing the bike and send them to
support@wickedelectricbikes.com.
Time is of the essence if there is carrier related damage to your new bike.
Let’s get started!
TOOLS NEEDED FOR ASSEMBLY:
Scissors
13mm crescent wrench (provided)
15mm crescent wrench (provided)
4mm allen key (provided)
5mm allen key (provided)
Tire pump
In the box:
- Destroyer 750 Electrocycle
- Front Wheel Assembly
- Handlebars w/controls
- Seat assembly
- Pedals
- Headlight
- Battery Charger
- 4mm/5mm allen wrench
- 13/15mm crescent wrench
IMPORTANT
IT IS NOT UNCOMMON FOR THE OUTER CARTON TO ARRIVE DAMAGED.
WE PACK THE BIKE VERY SECURELY, BUT IT IS INEVITABLE THERE IS OCCASIONAL
DAMAGE IN SHIPPING.
IF THERE IS DAMAGE TO YOUR BOX:
TAKE PICTURES OF ALL 6 SIDES PRIOR TO OPENING. FAILURE TO DO SO MAY VOID ANY
DAMAGE CLAIMS.
AFTER TAKING PICTURES OF THE OUTER CARTON, OPEN THE BOX AND TAKE PHOTOS
SHOWING THE INNER PACKING BEFORE REMOVING ANY COMPONENTS FROM THE BOX.
CAREFULLY INSPECT YOUR BIKE FOR DAMAGE. NOTE ANY DAMAGE.
IF YOU NOTICE ANY DAMAGE TO ITEMS SUCH AS THE FENDERS, FORKS, CHAINRING,
BRAKES, ETC. DO NOT RIDE YOUR BIKE UNTIL YOU HAVE BEEN CLEARED BY WICKED THUMB
CUSTOMER SUPPORT.
RIDING A DAMAGED BIKE AND THEREFORE CAUSING FURTHER DAMAGE WILL VOID YOUR
WARRANTY ON THE ADDITIONAL DAMAGED PARTS.
IF EVERYTHING LOOKS GOOD ON INSPECTION, CONTINUE WITH THE REST OF THIS MANUAL
AND ASSEMBLE YOUR BIKE AS INSTRUCTED.
First remove seat assembly and lift accessory box out from next to rear wheel.
Set aside. Cut corners on long side of box and fold down to create a work
surface. remove all zip ties and packing material. 
AttachHandleBars
When moving bars becareful not to pull right brake lever closed until the front wheel has been installed.
Please reference diagram above for installing handlebars. Using the Supplied 4mm Allen Wrench, Slightly Loosen Pinch Bolts (A) and ROTATE HANDLEBAR STEM 180 DEGREES SO 4 ALLEN BOLTS ARE FACING FORWARD.
You may also need to very slightly loosen the center bolt of the stem (C) to turn the neck. Remove the dust cap to access the bolt. Please be sure to Retighten center bolt (C) FIRST after rotating the stem forward.
Tighten to 6 foot pounds. Replace dust cap.
Tightenthepinchbolts by hand (A)to 6 foot lbs tolockthe stem in place.
DO NOT OVERTIGHTEN
Next, remove the 4 allen bolts ( B ) and gently remove front of handlebar clamp. Center handlebars into rear clamp and reinstall front clamp using 4 bolts removed from prior step. Tighten just enough to hold bars in place.
Continue to installation of front wheel.
After you have installed wheel, stand over bike and Adjust handle bar angle to
your personal comfort level. Fasten the 4 handlebar clamp bolts in an X
pattern so they are snug plus 1/4 turn . MAKE SURE HANDLEBARS ARE SECURE, BUT
DO NOT OVERTIGHTEN! 
Install Front Wheel
When the brake disc is not in the gap, DO NOT pull brake lever.
Loosen front axle nuts and slide washer and lock tab out towards loose nut
(Suspension Fork/Springer Models will not have a lock tab). For 750S Model
Front Brake Assembly Goto Appendix A.
Align the front brake disc into center of front brake pads and lower front
forks down onto axle. Rotate lock tab to the one o-clock position and insert
lock tab into hole on fork. Tighten front axle nuts by hand.
Slowly depress front brake lever until firm. Tighten front axle cap nuts with
15mm wrench until snug.
Return to Red Print of ‘Attach Handlebars’ Instructions on Prior Page to
Adjust Bars and Lock Down Handlebar Clamp Bolts.
Install Head Light
Attach the Headlight Mounting Bracket to the Lower Fork Crown Using 2 Provided
Allen Head Bolts. Before Installing Head Light, Use a 13mm wrench to remove
and install side bolts and washers to install head light. Rubber washers fit
between headlamp housing and mounting brackets. Adjust height and angle, then
fasten all the bolts. Connect the light power cable. 
Install Pedals
Install the pedal marked with an “L” on the left/driver’s side crank. It threads in counter-clockwise. The pedal marked with an “R” installs on the right side crank and threads in clockwise. Be careful not to cross thread the pedals. Tighten with a 15mm wrench. 
Insert and Adjust Saddle Height
Open Clamp lever and insert seatpost into seatpost tube. Position to desired
height and close clamp. If seatpost rotates, open clamp and twist one turn
clockwise while holding back nut. Close again. Recheck for rotation. Repeat
process again if necessary. 
Charge Battery before Your First Ride
Make sure to charge your battery to full capacity before your first ride. On
the lower left side tank, remove charge port cap and insert charger plug into
battery first. Plug charger into wall and begin charging ( red light will turn
on ). When the battery is fully charged, the charger status light will turn
from Red to Green. Unplug charger and replace charge port cap. The charger
will stop charging and enter trickle charge mode when full, but we don’t
recommend leaving the charger continuously hooked up when not in use.
Battery ON/OFF switch
The provided battery switch should be turned off when your bike is not in use to preserve battery life. It also serves as a kill switch in the event you need to quickly disable the motor.
Tips to extend battery life
-
Your battery is designed to last for 6-800 charge cycles if maintained properly.
-
Avoid extreme temperatures to prolong battery life. Avoid heat above 115 degrees if possible. Do not store your battery near an open flame, extreme heat or any combustibles. Do not store the battery where it can be subjected to rising water.
The battery should only be opened by a battery service professional or manufacturer. Opening the case will void your warranty. -
Like a gas gauge, The battery level indicator on the display screen is not always accurate (i.e. it may show 50% but only be 35% at that moment. We suggest getting a feel for your battery’s life related to your specific riding habits before expecting a certain range.
-
Frequent starts/stops and open throttle acceleration drain your battery much quicker than gradual changes. Rely on the pedal assist most of the time and use the throttle as necessary to get up to speed, climb hills, cross traffic etc.
-
Turn the ON/OFF switch to the OFF position when parking your bike.
-
For long term storage, reduce battery life to approximately 50% and remove from bike and store in a dry and moderate temperature place.
-
While the bike is water resistant, This bike is NOT waterproof. Do not take it through water deeper than 7 inches, otherwise there is a risk of the controller short circuiting. Water damage is not covered by your warranty.
-
Your battery should fully charge in 5-6 hours. If it hasn’t fully charged within 8 hours, please contact product support at support@wickedelectricbikes.com
Uninstall & Install Battery
To access the battery, begin by removing the two lower 4mm allen screws on the
driver side (left side) tank cover.
To remove battery, use the same 4mm Allen Key to remove the 4 bolts on the
battery.
Unplug both connectors at the front of the battery and carefully pull out.
Head Light Control
Push the button down to activate low beam and up to activate high beam.
Don’t forget to switch off the light and battery when you finish riding.
Setting your Display
To power on the bike, make sure the battery switch is turned to the on
position and hold down the power on/off switch on the left handlebar. The
Wicked Thumb logo will show on screen and you are ready to go. Hold the ‘SET’
button for 2 seconds to enter the configuration menu. The passcode is 2112.
Use ‘SET’ to save a value and move to the next field, +/- to scroll thru
parameter values.
Ex: + 2X to select ‘2’; ‘SET’ saves ‘2’ in field 1 and moves to field 2. + to
choose ‘1’, ‘SET’ to save and move to field 3. + to choose ‘1’.
‘SET’ to save and move to field 4.
“+“ two times to choose ‘2’ and ‘SET’ to save.
‘SET’ to “ENTER”
You should not have a need to enter the settings unless you want to limit the
speed of the bike, deactivate the throttle, change the mode or check an error
message. General Settings
Option 1.1 (Trip Clear). ‘SET’ to Y to reset tripmeter.
1.2 (Brightness) ‘SET’ to select, up and down to change level.
1.3 (Speed Limiter in KM) ’99’ is unlocked. 34 will limit the bike to 20mph.
Multiply each value by .6 to determine the mph limit (i.e 15mph is 25).
1.4 (Wheel Size) = 29 due to the fat tires. Do Not Change This.
1.5 (Unit) You can toggle between MPH and KPH 1.6 (Voltage) is 48v unless you
have a 52V battery upgrade
1.7 (Mode) Choose Normal, ECO or Power
1.8 (Exit to Main Menu) Option 2 (Advanced Settings):
Settings 2.1, 2.2 and 2.3 should NEVER be altered unless directed by Wicked
Thumb support. You may render your bike inoperable and void your motor,
controller and battery warranty.
2.4 (Throttle Speed) You can limit the throttle to 6km/h or unlock it
Option 2.5 (Throttle Level) default ‘N’ – this setting determines whether the
throttle is linked to the pedal assist level.
By switching to ‘Y’ the throttle will stay limited to the current pedal assist
level.
Your first ride
We strongly encourage you to wear a proper fitting helmet and eyewear when
riding your bike. Trucks and cars have been known to throw a rock or two into
the air, bugs have a knackering to find a way into your eyes and while it
might not seem you are going that fast, falling from 5-6 feet in the air will
do some unwanted remodeling to your noggin.
WEAR A HELMET!
Now is a great time to recheck your handlebars to make sure they won’t slide
forward or backwards or twist side to side independent of the wheel. Remember
pinch bolts and center bolt from (Attach Handlebars Page) If bars are loose
please tighten the handlebar clamp bolts slightly tighter for front to back
movement and the center bolt for side to side movement.
Before taking your first ride, check the tire pressure and set to 15-20 PSI.
DO NOT EXCEED 20 PSI. The Tube is not designed for higher PSI.
The +/- buttons will control your pedal assist (PAS) level. Default is ‘1’.
Get used to this level first, then start moving up and down as you feel
comfortable. Going down to ‘0’ will turn the motor off. Please see tips below.
On your first ride, we suggest riding away from any traffic or obstructions
just to be safe. Remember at any moment tapping the brakes will disengage the
motor.
Tips:
- Get used to riding the Destroyer as a regular bicycle, with no motor (PAS 0), shifting through gears, setting your seat and handlebar position and gaining an overall feel for the bike.
- Learn to understand how much stress is on the bike when climbing hills, or starting from a stop, based upon how much stress is on your legs.
- Pedal along. Remember the motor is there to enhance your power, not completely replace it.
- Review our blog post on battery life here
- After the first 100 miles, take your bike to a local bike shop (LBS) and have them perform a 100 mile tuneup/inspection. Here they will check fasteners for tightness, inspect for uneven wear, any misalignment, diagnose noises, etc. While predominantly a safety check, it’s also key in preventing rapid or uneven wear to components on your bike. It’s also nice to have a tech familiar with your bike throughout it’s lifetime.
- Remember to turn your lights on at night or in lower visibility settings, winding roads, fog, rain etc.
GO HAVE FUN. Riding a bike will forever be changed this day forward.
Email or call with any questions, comments, feedback, etc.
Thank you so much for joining us on this adventure! Cheers!
-The Wicked Thumb Army
WICKED THUMB® LIMITED WARRANTY
To make a warranty claim always keep your vehicle model, date of purchase,
vehicle serial number and retailer where you purchased the vehicle from.
The warranty is limited to the terms listed below:
Motor and controller: 1 year for parts. 3 months for labor
Frame: 1 year parts and labor
Charger: 1 year for parts
Battery: 2 years. Warranty on the battery starts the date of purchase of the
vehicle as new. The battery is sealed and cannot be opened or fixed. The
battery should not have a percentage of nominal charge retention of 60% or
less. Misuse of the battery, negligence or attempt to open or repair it will
void the warranty.
General vehicle: The vehicle is backed up by a general 1-year warranty.
Certain components listed on this chart or consumables may be subject to a
different period of coverage or not included in this warranty. Visit
wickedthumb.com/warranty for full warranty
details.
Consumables: Components subject to wear are not covered by the warranty:
Tires, inner tubes, brake lines, brake pads, wheel lining tape, light bulbs,
LEDS, fuses, etc.
If the warranty is void for any reason the customer shall bear any repair or
replacement costs resulting from vehicle misuse, negligence or abuse. Always
follow care and preventive maintenance procedures. Always keep receipts from
any services performed to the vehicle by an authorized distributor or service
center.
The warranty will be voided by any of the following circumstances:
- Failure to follow all directions or recommendations listed in this warranty and user’s manual.
- Cycling collision, accident or vehicle damage caused by careless parking or storage.
- Acts in violation of laws and regulations.
- Never performed service or maintenance on components
- DIY repairs on electronic components.
- Abusive use of the vehicle on off-road terrain, mud, snow, water, sand, gravel
- If vehicle is used as rental unit or taxi
- Damages caused by natural disasters such as earthquakes, lightning, fire, flooding and other hazards .
- Rust and/or paint fading caused by heavy exposure to rain, hail, snow or sunlight.
- Overloading beyond recommended capacity .
- Damages caused by nails, needles, broken glass , debris , sharp rocks or other foreign objects .
- If vehicle is used for stunts, jumping from ramps, stairs or elevated surfaces.
- If vehicle is used in competition or racing
- If motor, electrical system, suspension frame, wheels have been modified for any purposes
- Use of other components not approved by the manufacturer
- Damages resulted from improper transportation
- Filing a Chargeback while in possession of the bike
- Riding a bike with an unresolved technical issue that results in further damage
- Riding a bike damaged during shipping therefore causing further damage
- Second owner or purchased a demo unit from a dealer
- Paint and other cosmetic defects are not covered under warranty
info@wickedelectricbikes.com
+1 888-531-9311
Find more information, new bikes, parts and accessories at
www.wickedthumb.com
APPENDIX A
750S/Suspension Fork Upgrade Front Brake Installation
The caliper mounting assembly will arrive detached from your suspension forks.
Please note the position of the caliper mount, 180mm disc spacer and caliper
when removing it from the packing.
Remove the two allen bolts on the left front fork and Attach the brake caliper
mount to with angled leg placed up as shown below . Apply blue threadlocker if
available and tighten to 50 inch lbs. Do not overtighten the bolts as this may
lead to the mount cracking under heavy braking.
Place 180mm spacer with Up arrow facing forward and up between caliper and
caliper mount. Shorter bolt with washers will be placed in the top position
with the longer bolt in the bottom position. All washers go between the bolt
head and caliper. Thread in hand tight and return to the ‘Install front wheel’
section to continue assembly.
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>