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14. STEERING HANDLEBAR/FRONT WHEEL/FRONT
BRAKE/FRONT SHOCK ABSORBER/FRONT FORK VITALITY 50
SERVICE INFORMATION
SPECIFICATIONS
Item Standard (mm) Service Limit (mm)
Axle shaft runout 0.2
Radial 2.0
Front wheel rim runout
Axial 2.0
Front shock absorber spring free length 214.7
Brake disk thickness 4.0 3.0
Brake disk runout 0.30
Brake master cylinder I.D. 12.70012.743 12.75
Brake master cylinder piston O.D. 12.65712.684 12.64
Brake caliper piston O.D. 25.40025.405 25.45
Brake caliper piston I.D. 25.31825.368 25.30
TORQUE VALUES
Handlebar lock nut 5.06.0kgf-m Front axle nut 5.07.0kgf-m
Steering stem lock nut 0.5~1.3kgf-m Brake caliper bolt 2.9~3.5kgf-m
Steering top cone race 6.0~8.0kgf-m
SPECIAL TOOLS
Lock nut wrench F007
Lock nut socket wrench F001
Race cone install F005
TROUBLESHOOTING
Hard steering (heavy) · Contaminated brake disk or disk pad
· Excessively tightened steering stem top · Worn brake bushing
cone race · Worn brake master cylinder piston oil seal
· Broken steering balls · Clogged brake fluid line
· Insufficient tire pressure · Deformed brake disk
Steers to one side or does not track straight · Unevenly worn brake caliper
· Broken clutch weight spring Front wheel wobbling
· Bent front fork · Bent rim
· Bent front axle or uneven tire · Loose front axle
Poor brake performance · Bent spoke plate
· Incorrectly adjusted brake · Faulty tire
· Worn brake linings · Improperly tightened axle nut
· Contaminated brake lining surface Soft front shock absorber
· Worn brake cam · Weak shock springs
· Worn brake drum · Insufficient damper oil
· Poorly connected brake arm Front shock absorber noise
Poor brake performance (disk brake) · Slider bending
· Air in brake system · Loose fork fasteners
· Deteriorated brake fluid · Lack of lubrication
14-2