Baja WD250U Service Manual page 231

(4) Driving system
• Claw of gear end is down
(V) Clutch slips
(1) Clutch
• Improper adjustment of clamp plate release
rod clearance of clutch
• Clutch spring is loosen (primary clutch
and/secondary clutch)
• Clutch spring is fatigue (primary clutch
and/ secondary clutch)
• Friction disc is worn
• Clamp plate is worn or deformed
• Main clutch shoe lining is worn
(2) Engine oil
• Low oil level
• Poor quality (viscosity is low)
• Deteriorated oil
(VI) Clutch is locked
(1) Clutch
•Clutch is out of control or the clearance is
too big
• Improper match between release lever and
release rod
• Deformed clutch clamp plate
• Friction disc is deformed
• Clutch hub is broken
(2) Engine oil
• High oil level
• Poor oil quality (viscosity is high)
• Deteriorated oil
(VII) Engine is overheated
(1) Ignition system
• Improper spark plug clearance
• Wrong spark plug heating value
• CDI failure
(2) Fuel System
• Main jet of carburetor is wrong
• Improper oil level
• Core of air filter is clogged
(3) Cylinder system
• Serious carbon disposition
(4) Engine oil
• Improper oil level
• Improper oil toughness
• Poor oil quality
(5) Brake
• Brake is stagnant
(VIII) Brake trouble
Troubles: Poor brake efficient
• Brake shoe lining is worn
• Serious wear of brake shoe
• Brake shoe oil is too much
• Improper adjustment of brake clearance
• Improper brake arm position
• Returning spring is fatigue and damaged
• Brake cable is broken
(IX) Shock absorber failure/ improper
operation
1. Shock absorber failure:
• Damping rod is bent or damaged
• Bad oil sealing lip
• Spring of shock absorber is fatigue
2. Improper operation
(1) Handle bar
• Improper installation or handlebar is bent
(2) Steering system
• Wrong toe-in
• Steering pillar is bent
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