Kymco MO KXR 250 Service Manual - chap 14 (ruota ant, sps e sterzo)
14. FRONT WHEEL/FRONT SUSPENSION/
STEERING SYSTEM
14-0
Mongoose/KXR 250
14
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FRONT WHEEL/
FRONT SUSPENSION\STEERING SYSTEM
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SERVICE INFORMATION -------------------------------------------- 14- 2
TROUBLESHOOTING ------------------------------------------------- 14- 2
FRONT WHEEL--------------------------------------------------------- 14- 3
FRONT WHEEL HUB -------------------------------------------------- 14- 4
FRONT SUSPENSION ------------------------------------------------- 14- 7
TIE-ROD ----------------------------------------------------------------- 14-11
HANDLEBAR ----------------------------------------------------------- 14-13
STEERING COLUMN -------------------------------------------------- 14-15
14
14. FRONT WHEEL/FRONT SUSPENSION/
STEERING SYSTEM
14-1
Mongoose/KXR 250
14. FRONT WHEEL/FRONT SUSPENSION/
STEERING SYSTEM
14-2
Mongoose/KXR 250
SERVICE INFORMATION
GENERAL INSTRUCTIONS
• Jack the machine front wheel off the ground and be careful to prevent the machine from falling
down.
• During servicing, keep oil or grease off the brake disk
• Inspect the brake system before riding.
SPECIFICATIONS
Item
Standard (mm)
Service Limit (mm)
Radialæ2.0
Axialæ2.0
Tie rod length
299.5±0.5
æ
Rod-end (tie rod) angle
180ºæ
TORQUE VALUES
Steering stem nut 6.0_ 8.0kgf-m
Front swing arm nut 4.0_ 5.0kgf-m
Front wheel nut 5.0_ 6.0kgf-m
Front wheel hub nut 6.0~8.0kgf-m
Steering knuckle nut 3.0_ 4.0kgf-m
Front shock absorber upper
mount bolt 3.5_ 4.5kgf-m
Front shock absorber lower
mount bolt 3.5_ 4.5kgf-m
SPECIAL TOOLS
Oil seal and bearing install E014
TROUBLESHOOTING
Hard steering (heavy) Front wheel wobbling
•Insufficient tire pressure • Bent rim
• Excessive wheel bearing play
• Bent spoke plate
• Faulty tire
Steers to one side or does not track straight • Improperly tightened axle nut
• Uneven front shock absorbers Soft front shock absorber
• Bent front arm • Weak shock springs
• Bent steering knuckle • Insufficient damper oil
Front shock absorber noise
• Slider bending
• Loose arm fasteners
• Lack of lubrication
Front wheel rim run out
14. FRONT WHEEL/FRONT SUSPENSION/
STEERING SYSTEM
14-3
Mongoose/KXR 250
FRONT WHEEL
REMOVAL AND INSPECTION
Place the machine on a level place.
Remove four nuts attaching the front wheel
hub and front wheel.
Elevate the front wheels by placing a
suitable stand under the frame.
Measure the wheel run out.
Replace wheel or check bearing play if out
of specification
Rim run out limits:
Vertical: 2.0mm
Lateral: 2.0mm
INSTALLATION
When reinstalling a wheel, tighten the wheel
nuts in a crisscross (rather than a circular)
pattern.
Torque: 5.0_ 6.0kgf-m
Support the machine securely so
there is no danger of it falling over.
°Ø
Be sure the tapered side of the wheel
nuts face the wheel rim.
°Ø
Nuts
14. FRONT WHEEL/FRONT SUSPENSION/
STEERING SYSTEM
14-4
Mongoose/KXR 250
FRONT WHEEL HUB
REMOVAL AND INSPECTION
Place the machine on a level place.
Remove the front wheel (!14-3) and
caliper. (!13-8)
Elevate the front wheels by placing a
suitable stand under the frame.
Remove the cotter pin.
Remove nut attaching the front wheel hub
and then remove front wheel hub.
DISASSEMBLY
Remove the outside collars.
Inspect the dust seals for wear or damage.
If any defects are found, replace the dust
seal with a new one.
Remove the dust seals by a flat-head screw
driver.
Inspect the bearings for allow play in the
front wheel hub or the wheel turns roughly.
Support the machine securely so
there is no danger of it falling over.
°Ø
Place a wood block against the outer
edge to protect this edge.
°Ø
Nuts
Cotter Pin
Outside Collar
Dust Seal
Outside Collar
Dust Seal
Bearing
14. FRONT WHEEL/FRONT SUSPENSION/
STEERING SYSTEM
14-5
Mongoose/KXR 250
If any defects are found, replace the bearings
Remove the bearings using a general bearing
puller.
Remove the distance collar from the front
wheel hub.
ASSEMBLY
Install the left new bearing and dust seal into
the front wheel hub.
Oil seal and bearing install E014
Special
Apply the grease onto the oil seal lips,
bearing.
°Ø
Bearing
Distance Collar
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