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Troubleshooting - KYMCO ZX/SCOUT 50 Service Manual

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13. STEERING HANDLEBAR/FRONT WHEEL/FRONT
BRAKE/FRONT SHOCK ABSORBER/FRONT FORK
SPECIFICATIONS
Axle shaft runout
Front wheel rim runout
Front brake drum I.D.
Front brake lining thickness
Front shock absorber spring free length
Brake disk thickness
Brake disk runout
Brake master cylinder I.D.
Brake master cylinder piston O.D.
Brake caliper piston O.D.
Brake caliper piston I.D.
TORQUE VALUES
Handlebar lock nut
Steering stem lock nut
Steering top cone race
SPECIAL TOOLS
Lock nut wrench
Lock nut socket wrench
Outer driver, 28x30mm
Rear shock absorber remover
Rear shock absorber compressor
Ball race remover

TROUBLESHOOTING

Hard steering (heavy)
• Excessively tightened steering stem top
cone race
• Broken steering balls
• Insufficient tire pressure
Steers to one side or does not track straight
• Broken clutch weight spring
• Bent front fork
• Bent front axle or uneven tire
Poor brake performance
• Incorrectly adjusted brake
• Worn brake linings
• Contaminated brake lining surface
• Worn brake cam
• Worn brake drum
• Poorly connected brake arm
Poor brake performance (disk brake)
• Air in brake system
• Deteriorated brake fluid
Item
Radial
Axial
4.0 5.0kg-m
8.0 12.0kg-m
0.5 1.3kg-m
Standard (mm)
110
4.0
200
35 3.8
12.700 12.743
12.657 12.684
25.400 25.405
25.318 25.368
Front damper nut
Front axle nut
Brake arm bolt
Driver handle A
Outer driver, 37x40mm
Pilot, 10mm
Bearing puller
Snap ring pliers (close)
Damper compressor
• Contaminated brake disk or disk pad
• Worn brake bushing
• Worn brake master cylinder piston oil seal
• Clogged brake fluid line
• Deformed brake disk
• Unevenly worn brake caliper
Front wheel wobbling
• Bent rim
• Loose front axle
• Bent spoke plate
• Faulty tire
• Improperly tightened axle nut
Soft front shock absorber
• Weak shock springs
• Insufficient damper oil
Front shock absorber noise
• Slider bending
• Loose fork fasteners
• Lack of lubrication
ZX / SCOUT
Service Limit (mm)
0.2
2.0
2.0
111
2.0
182.8
3.0
0.30
12.75
12.64
25.45
25.30
1.5 3.0kg-m
5.0 7.0kg-m
0.4 0.7kg-m
13-2

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