Frame Troubleshooting
Chain - noisy
• not lubricated
• slaps - xsive play, worn chain and sprockets
• whines - too tight
Chain - not straight
• wheel alignment
• rear wheel not spaced properly
Exceesive Vibration
• loose mounting bolts
• frame cracked, broken
• loose spokes
• wheels not balanced - particularly the front
• rims not true
• wheel bearings
• tyres worn, damaged, wrong pressure
• axle or swingarm nuts loose
• steering head bearings
• swingarm bushes or bearings
• badly worn chain and sprockets
• crankshaft bearings
• forks bent or not aligned, unequal oil levels
• no fork brace
• rear shocks
• handle bar mounts worn
• foot peg rubbers worn
Front Forks
• too much, too little or unequal oil levels
• oil- wrong viscosity, dirty
• seals leaking
• springs - weak, broken, collapsed
• bent tubes
• slider deformed from alu removal or polishing heat
• no fork brace
• fork slider bush is worn - noisy, play
Pulls To One Side
• bent forks or axle
• unbalanced suspension operation
Stiff Steering
• front tyre pressure is low
• steering damper too tight
• steering head bearings too tight
• bearings dry or damaged
• steering stem is bent
• rear shocks uneven
Uncertain Handling
• low tyre pressures
• steeringhead bearings worn or loose
• rear shocks defect, unequal, not set for load
• swingarm bushes or bearings are worn
• loose axle
• loose spokes
• rim untrue
Brakes - squeal
• linings or pads glazed, hard, worn, damaged
• dirty linings, drum or disc
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Disc Brakes
Disc Brakes - excessive lever travel, power loss
• lines leaking
• air in lines
• master cylinder low
• piston o ring leaking
Disc Brakes - normal travel, power loss
• disc distorted
• pads - worn, damaged or dirty
Disc Brakes - shudders
• disc warped
• loose mounting bolts
• dirty pads
• worn, damaged or distorted pads
Disc Brakes - scored
• dirty pads
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Drum Brakes
Drum Brakes – don’t hold
• adjustment
• linings worn, wet, oily, glazed
• drums worn or damaged
Drum Brakes – on-off feel
• drum not round
• uneven road surface