9 - 4
TRBL
SHTG
OVERHEATING/FAULTY BRAKE/
SHOCK ABSORBER MALFUNCTION
EBS00547
OVERHEATING
OVERHEATING
Ignition system
• Improper spark plug gap
• Improper spark plug heat range
• Faulty C.D.I. unit
Fuel system
• Improper carburetor main jet
(improper setting)
• Improper fuel level
• Clogged air filter element
Compression system
• Heavy carbon deposit
Engine oil
• Improper oil level
• Improper oil viscosity
• Inferior oil quality
Brake
• Brake drag
Cooling system
• Low coolant level
• Clogged or damaged radiator
• Damaged or faulty water pump
• Faulty fan motor
• Faulty thermo switch
EBS00550
FAULTY BRAKE
POOR BRAKING EFFECT
Disc brake
• Worn brake pads
• Worn disc
• Air in brake fluid
• Leaking brake fluid
• Faulty master cylinder kit cup
• Faulty caliper kit seal
• Loose union bolt
• Broken brake hose and pipe
• Oily or greasy disc/brake pads
• Improper brake fluid level
EBS00551
SHOCK ABSORBER MALFUNCTION
MALFUNCTION
• Bent or damaged damper rod
• Damaged oil seal lip
• Fatigued shock absorber spring
• Leaking oil or gas
Summary of Contents for 2003 YFZ450S
Page 1: ...YFZ450S5TG2 AE1 SERVICE MANUAL ...
Page 2: ......
Page 8: ......
Page 9: ...GEN INFO 1 ...
Page 11: ...GEN INFO ...
Page 20: ......
Page 21: ...SPEC 2 ...
Page 23: ...SPEC ...
Page 34: ...2 11 SPEC ENGINE SPECIFICATIONS Cylinder head tightening sequence ...
Page 69: ......
Page 70: ...CHK ADJ 3 ...
Page 139: ...ENG 4 ...
Page 143: ...ENG ...
Page 224: ...COOL 5 ...
Page 226: ...COOL ...
Page 234: ......
Page 235: ...CARB 6 ...
Page 237: ...CARB ...
Page 248: ...CHAS 7 ...
Page 320: ......
Page 321: ...ELEC 8 ...
Page 323: ... ELEC ...
Page 338: ...8 15 ELEC IGNITION SYSTEM 4 Install throttle lever cover ...
Page 366: ...TRBL SHTG 9 ...
Page 368: ...TRBL SHTG ...
Page 374: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...