2004 YAMAHA WR 450F bolt pattern

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Page 220 of 754

YAMAHA WR 450F 2004  Notices Demploi (in French) 3 - 21
INSP
ADJ
VALVE CLEARANCE ADJUSTMENT
5. Adjust:
Valve clearance
Adjustment steps:
Loosen the timing chain tensioner cap
bolt.
Remove the timing chain tensioner and
camshaft caps.
NOTE:
Remove

Page 346 of 754

YAMAHA WR 450F 2004  Notices Demploi (in French) 4 - 23
ENGCAMSHAFTS
REMOVAL POINTS
Camshaft
1. Remove:
Timing plug 1 
Straight plug 2 
2. Align:
“I” mark
With stationary pointer.
Checking steps:
Turn the crankshaft counterclockwise with
a w

Page 350 of 754

YAMAHA WR 450F 2004  Notices Demploi (in French) 4 - 25
ENGCAMSHAFTS
4. Measure:
Camshaft-to-cap clearance 
Out of specification → Measure cam-
shaft journal diameter. 
Camshaft-to-cap clearance:
0.020 ~ 0.054 mm 
(0.0008 ~ 0.0021 in)
<Limit>: 0.

Page 354 of 754

YAMAHA WR 450F 2004  Notices Demploi (in French) 4 - 27
ENGCAMSHAFTS
Fit the timing chain 3 onto both camshaft
sprockets and install the camshafts on the
cylinder head.
NOTE:
The camshafts should be installed onto the
cylinder head so that the exha

Page 408 of 754

YAMAHA WR 450F 2004  Notices Demploi (in French) 4 - 54
ENGCLUTCH
8. Install:
Clutch spring
Bolt (clutch spring)
NOTE:
Tighten the bolts in stage, using a crisscross
pattern.
T R..8 Nm (0.8 m · kg, 5.8 ft · lb)
9. Install:
Gasket (clutch cover)

Page 418 of 754

YAMAHA WR 450F 2004  Notices Demploi (in French) 4 - 59
ENG
OIL FILTER, WATER PUMP AND CRANKCASE COVER
(RIGHT)
EC4G5220
Impeller shaft
1. Install:
Impeller shaft 1 
Plain washer 2 
Impeller 3 
NOTE:
Take care so that the oil seal lip is not dam-

Page 462 of 754

YAMAHA WR 450F 2004  Notices Demploi (in French) 4 - 81
ENG
5. Install:
Bolt (starter clutch) 1 
Plain washer (rotor)
Nut (rotor) 2 
Use the sheave holder 3.
NOTE:
Tighten the rotor nut to 65 Nm (6.5 m·kg,
47 ft·lb), loosen and retighten the ro

Page 494 of 754

YAMAHA WR 450F 2004  Notices Demploi (in French) 4 - 97
ENGCRANKCASE AND CRANKSHAFT
5. Install:
Dowel pin 1 
O-ring 2 
Crankcase (right)
To crankcase (left).
NOTE:
Fit the crankcase (right) onto the crankcase
(left). Tap lightly on the case with
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