Yamaha WR450F, Owner'S Service Manual

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4 - 103
ENG
CRANKCASE 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 soft ham-
mer.
• When installing the crankcase, the connect-
ing rod should be positioned at TDC (top
dead center).
New
6. Tighten:
• Hose guide
1
• Clutch cable holder
2
• Bolt (clutch cable holder)
• Bolt (crankcase)
NOTE:
Tighten the crankcase tightening bolts in
stage, using a crisscross pattern.
7. Install:
• Timing chain
• Timing chain guide (rear)
• Bolt (timing chain guide)
8. Remove:
• Sealant
Forced out on the cylinder mating surface.
9. Apply:
• Engine oil
To the crank pin, bearing and oil delivery
hole.
10. Check:
• Crankshaft and transmission operation.
Unsmooth operation
→
Repair.
T
R .
.
10 Nm (1.0 m · kg, 7.2 ft · lb)
T
R .
.
12 Nm (1.2 m · kg, 8.7 ft · lb)
T
R
.
.
10 Nm (1.0 m · kg, 7.2 ft · lb)