Yamaha XVS650 Service Manual page 323

OVERHEATING/FAULTY BRAKE/FRONT FORK OIL
ISTHRTBU
?
LEAKAGE AND FRONT FORK MALFUNCTION,
gJ
EB905000
OVERHEATING
OVERHEATING
Ignition system
• Improper spark plug gap
• Improper spark plug heat range
• Faulty ignitor unit
Fuel system
• Improper carburetor main jet setting
• Improper fuel level
• Clogged air filter element
EB906001
FAUL
TV
BRAKE
POOR BRAKING EFFECT
Disc brake
• Worn brake pad
• Worn disc
• Air in brake fluid
• Leaking brake fluid
• Faulty cylinder kit cup
• Faulty caliper kit seal
• Loose union bolt
• Broken brake hose
• Oily or greasy disc/brake pad
• Improper brake fluid level
Compression system
• Heavy carbon build-up
Engine oil
• Improper oil level
• Improper oil viscosity
• Inferior oil quality
Brake
• Brake drag
Drum brake
• Worn brake shoe
• Worn or rusty brake drum
• Improper brake free play adjustment
• Improper brake cam lever position
• Improper brake shoe position
• Fatigue/fau Ity return spring
• Oily or greasy brake shoe/brake drum
• Broken brake rod
EB907000
FRONT FORK OIL LEAKAGE AND FRONT FORK MALFUNCTION
MALFUNCTION
• Bent, deformed or damaged inner tube
• Bent or deformed outer tube
• Damaged fork spring
• Worn or damaged slide metal
• Bent or damaged damper rod
• Improper oil viscosity
• Improper oil level
8-4
OIL LEAKAGE
• Bent, damaged or rusty inner tube
• Damaged or cracked outer tube
• Damaged oil seal lip
• Improperly installed oil seal
• Improper oil level (too high)
• Loose damper rod holding bolt
• Broken cap bolt O-ring
• Loose drain bolt
• Damaged drain bolt gasket