Front Fork Malfunction; Unstable Handling - Yamaha Libero Workshop Manual

R-207
OIL LEAKAGE
• Bent damaged or rusty Inner Tube
• Damaged or cracked Outer Tube
• Damaged oil seal lip.
• Loose hexagon Bolt
• Damaged Cap Bolt O-ring
• Improperly installed Oil seal
Handlebars
• Improperly installed or bent
• Loose Handlebar Tightening Bolt
Steering
• Improperly installed Handlebar Crown
• Loose or overtightened Steering Nut
• Loose or overtightened Steering Nut
• Bent Under Bracket
• Improperly installed Steering Shaft (improp-
erly tightened Ring Nut)
• Damaged Bearing or Ball Race
Front forks
• Uneven oil levels on both sides
• Uneven spring tension
• Broken Front Fork Spring
• Fatigued Front Fork Spring
• Twisted Front Forks

FRONT FORK MALFUNCTION /

UNSTABLE HANDLING

FRONT FORK MALFUNCTION
MALFUNCTION
• Bent Inner Tube
• Deformed Outer Tube
• Damaged Fork Spring
• Bent Cylinder Complete
• Improper oil viscosity / Level
UNSTABLE HANDLING
Wheels
• Incorrect Wheel balance
• Loose Spokes
• Deformed Wheel Rim
• Unevenly worn Tyres
• Incorrect Tyre pressure
• Loose Bearing
• Bent or loose Wheel Axle
• Excessive Wheel Runout
Frame
• Twisted
• Improperly installed Bearing Race
• Faulty Bushing
• Bent Rear Arm
Rear arm
• Worn or damaged Bush
• Bent rear arm
Rear shock absorber
• Fatigued spring
• Improperly adjusted Spring preload
• Oil leakage
Drive chain
• Improperly adjusted Chain line
8-5
TRBL
SHTG