2008 YAMAHA WR 450F Owners Manual

Page 25 of 224

YAMAHA WR 450F 2008  Owners Manual 1-15
STARTING AND BREAK-IN
The engine fails to start
Pull the hot starter lever all the way 
out and while holding the lever, kick 
the kickstarter crank 10 to 20 times to 
clear the engine. Then, res

Page 26 of 224

YAMAHA WR 450F 2008  Owners Manual 1-16
TORQUE-CHECK POINTS
TORQUE-CHECK POINTS
Concerning the tightening torque, refer to "TIGHTENING TORQUES" section in the CHAPTER 2.
Frame construction Frame to rear frame
Combined seat and fuel tan

Page 27 of 224

YAMAHA WR 450F 2008  Owners Manual 1-17
CLEANING AND STORAGE
CLEANING AND STORAGE
CLEANING
Frequent cleaning of your machine 
will enhance its appearance, maintain 
good overall performance, and ex-
tend the life of many components.
1.

Page 28 of 224

YAMAHA WR 450F 2008  Owners Manual 2-1
GENERAL SPECIFICATIONS
SPECIFICATIONS
GENERAL SPECIFICATIONS
Model name: WR450FX  (CDN, AUS, NZ)
WR450F (EUROPE, ZA)
Model code number: 5TJK (CDN)
5TJL (EUROPE)
5TJM (AUS, NZ, ZA)
Dimensions: CDN,

Page 29 of 224

YAMAHA WR 450F 2008  Owners Manual 2-2
GENERAL SPECIFICATIONS
(Except for CDN)
SAE10W30, SAE10W40, SAE15W40,
SAE20W40 or SAE20W50
API service SG type or higher,
JASO standard MA
Oil capacity:
Engine oil
Periodic oil change 0.95 L (0.84

Page 30 of 224

YAMAHA WR 450F 2008  Owners Manual 2-3
GENERAL SPECIFICATIONS
Chassis: CDN, ZA  AUS, NZ EUROPE
Frame type Semi double cra-
dle←←
Caster angle 27.3 ° 27.0 ° 26.8 °
Trail 117 mm (4.61 in) 116 mm (4.57 in) 115 mm (4.53 in)
Tire:
Ty

Page 31 of 224

YAMAHA WR 450F 2008  Owners Manual 2-4
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINE
Item Standard Limit
Cylinder head:
Warp  limit ---- 0.05 mm (0.002 
in)
Cylinder:
Bore size 95.00–95.01 mm (3.7402–3.7406 in) ----

Page 32 of 224

YAMAHA WR 450F 2008  Owners Manual 2-5
MAINTENANCE SPECIFICATIONS
Valve, valve seat, valve guide:
Valve clearance (cold)
IN 0.10–0.15 mm (0.0039–0.0059 in) ----
EX 0.20–0.25 mm (0.0079–0.0098 in) ----
Valve dimensions:
"A" head