SPARTAN SP-3048 BMX Bike Owner’s Manual

: June 16, 2024
: SPARTAN

Table of Contents

Youth
- MOUNTAIN BIKE PARTS IDENTIFICATION
- MAINTENANCE & REPAIR
  - LUBRICATION
  - ADJUSTMENT – REAR DERAILLEUR
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Owner’s Manual

THIS INSTRUCTION BOOKLET CONTAINSIMPORTANT SAFETY INFORMATION.
PLEASE READ AND KEEP FOR FURTHER REFERENCE.

MOUNTAIN BIKE PARTS IDENTIFICATION

NOTE: This is a typical Bicycle. Your bike may have other or different parts, and in sonic cases, may not have all parts shown here.

IMPORTANT: Use this Diagram when reading this manual to help you understand directions and instructions.

Rear Hub
Wheel Reflector
Rear Brake
Seat Post Clamp
Rear Reflector
Seat
Seat Post
Top Tube
Grips
Handlebar
Front Reflector
Stem
Brake Lever
Shifter
Head Tube
Front Fork
Front Hub
Spokes
Disk Brake Rotor
Front Brake
(This is a disk, your bike may have a V-Brake instead)
Disk Brake Caliper
Down Tube
Seat Tube
Chain wheel
Crank Art
Pedal
Front Derailleur
Chain
Chain Stay
Rear Derailleur
Tire
Rim

BEFORE RIDING:

Your new bicycle was assembled and tuned in the factory and then partially disassembled for shipping. The following instructions will enable you to prepare your bicycle for years of enjoyable cycling. For more details on inspection, lubrication, maintenance and adjustment of any parts of the bicycle please refer to the relevant sections in this manual. If you have questions about your ability to properly assemble this bicycle, please consult a professional bicycle mechanic before riding.

TO AVOID INJURY, THIS PRODUCT MUST BE PROPERLY ASSEMBLED BEFORE USE. WE STRONGLY RECOMMEND THAT YOU REVIEW THE COMPLETE ASSEMBLY GUIDE AND PERFORM CHECKS SPECIFIED IN THE OWNER’S MANUAL BEFORE RIDING.

5/6mm hex wrench
Torque wrench
Air pump & tire gauge to inflate tires
Bicycle lubricant or grease
6″ adjustable wrench
Phillips & standard screwdrivers
A pair of pliers with cable cutting ability

The foregoing is a list of tools necessary for maintenance and for assembly.
All should be available at the store where the bicycle was purchased.

ASSEMBLING YOUR BIKE

PREPARATION

It is important that you read this owner’s manual before you start to assemble your bicycle. WE RECOMMEND THAT YOU CONSULT A PROFESSIONAL BICYCLE MECHANIC IF YOU HAVE DOUBTS OR CONCERNS AS TO YOUR ABILITY TO PROPERLY ASSEMBLE, REPAIR, OR MAINTAIN YOUR BICYCLE. Remove all parts from the shipping carton. Check to make sure no parts are loose on the bottom of the canon. Carefully remove the front wheel which is attached to the side of the bicycle for shipping. Carefully remove all other packing material from the bicycle. This includes zip tics, axle caps and material protecting the frame.

FRONT WHEEL

Remove the nuts, washers and wheel retainers from the front wheel.
Slide the wheel onto the open ends of the fork. Slip an axle retainer onto each end of the axle, and hook the retainers into the holes in the fork end. Loosely install the washer onto each end of the axle (serrated end toward the retainer), then install the hex nut. (Note: there may be a washer head nut in place of the washer and hex nut).
Center the wheel in the fork and tighten the axle nuts securely, alternating from one side to the other to center the wheel.
Spin the wheel to make sure that it is centered in the fork and does not wobble. If the wheel is not centered, loosen the nuts and try again.
If your bicycle has a quick release mechanism, read and follow the quick release information on this manual.

Torque requirement: 16-20 ft.. lbs.

AXLE
WHEEL RETAINER
WASHER HEAD NUT

KICKSTAND

If your bike is equipped with a kickstand, please follow the instructions below.

Place the bicycle in an upright position.
Remove the top plate from the kickstand.
From the left side of the bicycle (opposite side from chainring), place the kickstand in position beneath the two rear fork legs.
Place the top plate, flange down, onto the mounting bolt.
Replace the washer and nut onto the mounting bolt. Hold the kickstand arm in an up position aligned with the frame stay, then securely tighten the mounting bolt.
Leave the leg of the kickstand down so it will support the bicycle during the rest of the assembly process.

WARNING! THE KICKSTAND IS DESIGNED TO SUPPORT THE, BICYCLE ONLY, NOT THE BICYCLE AND RIDER.

NUT
WASHER
TOP PLATE
KICKSTAND LEG

WARNING! Use your kickstand to support the bike when not riding. Allowing your bike to lay on it’s side can damage the brake levers and cause an unsafe riding condition and could result in injury to the rider.

REAR MOUNT KICKSTAND

If your bike is equipped with a rear mount kickstand, please follow the instructions below:

Lean the bike against a wall for support, so that the right side (chainring side) is facing the wall and the left side of the bike is facing out.
Remove the rear axle nut and washer from the left side rear wheel.
Slide the kickstand plate onto the axle, so that it is seated against the rear dropout.
Slide the washer and nut back onto the axle and tighten securely.
Leave the leg of the kickstand down so it will support the bicycle during the rest of the assembly process.

WARNLNG! THE KICKSTAND IS DESIGNED TO SUPPORT THE BICYCLE ONLY, NOT THE BICYCLE AND RIDER.

WASHER
REAR DROPOUT
REAR AXLE NUT
KICKSTAND LEG

HANDLEBAR AND STEM INSTALLATION

QUILL STEM ASSEMBLY

1. Remove plastic packaging material covering the expander wedge.
2. Loosen the stem expander bolt, if necessary, so the wedge nut is in line with the stem body. See illustration.
3. Insert the stem into the head tube past the minimum insertion line indicated on the stem.

WARNING: THE HANDLEBAR STEM MUST BE INSERTED INTO THE HEAD TUBE UNTIL THE MINIMUM INSERTION LINE INDICATED ON THE STEM IS COMPLETELY COVERED.

4. Face the handlebar stem forward directly in line with the front wheel. Make sure the fork is in the correct position (facing forward) before tightening the expander bolt. See illustration on this page.
5. Tighten the expander bolt securely (turning in a clockwise direction). Recommended torque is 20 ft. lbs.

WARNING: THE ASSEMBLER IS CAUTIONED AGAINST THE DANGER OF DAMAGING THE HANDLEBAR STEM ASSEMBLY AND POSSIBLE INJURY TO THE RIDER IN OVERTIGHTENING THE EXPANDER BOLT AND EXPANDER WEDGE.

HANDLEBAR INSTALLATION

Remove the stem cap bolts and stem cap.
Insert the handlebar into the stem.
Reattach the stem cap by tightening the stem cap bolts equally. Note the distance between the stem and stem cap should be equal on top and bottom of the cap.
Check the handlebar for tightness. If you can move it forward or backward, the cap bolt is not tight enough.
Check steering by straddling the front wheel and trying to turn the handlebar. If you can turn the handlebar without turning the front wheel. The stem is too loose. Align the handlebar with the front wheel. Retighten the expander bolt (clockwise).

Recommended torque is 15 ft lbs.

Cap Bolts
Expender Bolt
Stem
Minimum Insertion Line
Wedge Nut
Head Tube
CORRECT
Fork points forward.
INCORRECT
Fork points backward

V-BRAKE ASSEMBLY & ADJUSTMENT

If not already assembled, take the brake noodle from the parts box and slide the cable through the larger opening. The cable housing will then seat into the end of the noodle. Slide the cable through the cable lead on the end of the left brake arm, this will cause the noodle to fit into the lead. Slip the brake cable boot over the cable and position it between both brake arms. Next, loosen the 5mm anchor bolt at the end of the right brake arm and slide the cable under the retaining washer. Pull the slack out of the cable making sure a distance of 39mm or more remains between the end of the lead and the start of the anchor bolt. Once the cable is secured to the brake arms, engage the brake lever several times, checking the position of the brake shoes at the rim. The brake shoes should be 1mm away from the rim when in a relaxed position. When the brake lever is engaged, the brake shoe should hit the rim flush (never the tire) with the front brake pad touching the rim slightly before the rear. This is called ‘toeing-in” your brake shoe. If this position is not achieved, adjustments to the brake shoe are required. Loosen the brake shoe hardware and reposition the brake shoe. It may take several shoe and cable adjustments before the required position is accomplished.

Brake Noodle
Outer Cable Lead
Brake Cable Boot
Anchor Bolt
Brake Arm/Body
Tension Screw
Brake Shoe
Pivot Bolt

3. While holding the shoe against the rim, tighten the shoe fixing nut.

shoe fixing nut
5 mm Allen key
Allow 1mm clearance below tire edge and brake pad.

4. Pass the inner cable through the inner cable lead. Set the cable with a clearance of 1mm between each brake pad and the rim, tighten the cable fixing bolt.

5 mm Allen key

5. Adjust the balance with the spring tension adjustment screws.

Spring tension adjustment screw

6. Depress the brake lever about 10 times as far as the grip to check that everything is operating correctly and that the shoe clearance is correct before using the brakes.

Depress about 10 times

MAINTENANCE & REPAIR

LUBRICATION

All the pivoting points of the front and rear derailleurs should be lubricated with light oil at least every month. Be sure to wipe off any excess oil to prevent attraction of dirt into the mechanisms. The shifting cables should be cleaned and re-coated with a thin layer of grease every six months, or whenever new cables are being installed.

ADJUSTMENT – REAR DERAILLEUR

The Low limit screw determines how far the rear derailleur will travel toward the wheel of the bicycle, while the High limit screw determines how far the cage will travel toward the frame.

Shift the rear shifter to the largest number indicated, disconnect the rear derailleur cable from the cable anchor bolt and place the chain on the smallest sprocket.
Adjust the High limit screw so the chain and the smallest sprocket arc lined up vertically. Remove any slack in the cable by pulling it taut, then re-connect the cable and tighten the cable anchor bolt securely.
Some derailleurs have an adjusting barrel (see drawing). Use the adjusting barrel to fine tune the adjustment of the chain location. Turning the adjusting barrel clockwise will move the derailleur outboard – away from the wheel – while turning it clockwise will direct the chain inboard – towards the wheel.
Shift the chain onto the largest sprocket; adjust the low limit screw so the chain and the largest cog are lined up vertically. If you are unable to get the chain to the largest cog, turning the Low limit screw counter-clockwise will enable the chain to move towards the wheel.
Shift through the gears ensuring each gear is achieved quietly and without hesitation.

NOTE: It may take several adjustments to achieve the desired positioning. Please refer to the troubleshooting section for more assistance.
NOTE: Some bicycles may be equipped with a rear derailleur mechanism that works in REVERSE to the directions above.

Rear Derailleur Rear View