2008 YAMAHA YZ450F Owners Manual

Page 41 of 188

YAMAHA YZ450F 2008  Owners Manual 2-19
CABLE ROUTING DIAGRAM
E. Pass the clutch cable in front of 
the radiator mounting boss.
F. Install the connector cover so 
that it does not come in between 
the radiator hose 1 and radiator.
G. P

Page 42 of 188

YAMAHA YZ450F 2008  Owners Manual 2-20
CABLE ROUTING DIAGRAM
1. Hot starter cable
2. Clamp
3. Throttle position sensor lead
4. Hump (frame)
5. Neutral switch lead
6. Engine bracket
7. Lower engine guard stay
8. CDI magneto lead
9. Clu

Page 43 of 188

YAMAHA YZ450F 2008  Owners Manual 2-21
CABLE ROUTING DIAGRAM
D. Fasten the throttle position sen-
sor lead to the frame behind its 
hump.
E. Pass the neutral switch lead on 
the inside of the engine bracket.
F. Pass the neutral switch

Page 44 of 188

YAMAHA YZ450F 2008  Owners Manual 2-22
CABLE ROUTING DIAGRAM
1. Throttle cable (pull)
2. Throttle cable (return)
3. Radiator hose 2
4. Ignition coil
5. Rear arm bracket
6. Cylinder head breather hose
A. Pass the throttle cables over t

Page 45 of 188

YAMAHA YZ450F 2008  Owners Manual 2-23
CABLE ROUTING DIAGRAM
1. Brake master cylinder
2. Brake hose holder
3. Brake hose
A. Install the brake hose so that its 
pipe portion directs as shown 
and lightly touches the projec-
tion on the

Page 46 of 188

YAMAHA YZ450F 2008  Owners Manual 2-24
CABLE ROUTING DIAGRAM
1. Throttle cable
2. Clamp
3. Hot starter cable
4. Clutch cable
5. Engine stop switch lead
6. Cable guide
7. Brake hose
8. Hose guide
A. Fasten the engine stop switch 
lead

Page 47 of 188

YAMAHA YZ450F 2008  Owners Manual 3-1
MAINTENANCE INTERVALS
REGULAR INSPECTION AND ADJUSTMENTS
MAINTENANCE INTERVALS
The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind that such factors

Page 48 of 188

YAMAHA YZ450F 2008  Owners Manual 3-2
MAINTENANCE INTERVALS
Replace●
TRANSMISSION
Inspect
●
Replace bearing●
SHIFT FORK, SHIFT CAM, 
GUIDE BAR
Inspect
●Inspect wear.
ROTOR NUT
Retighten
●●
EXHAUST PIPE, SILENCER, 
PROTECTO