Yamaha YZ450F(W), Owner'S Service Manual

Page: 428 / 650

4 - 94
ENG
CRANKCASE AND CRANKSHAFT
5. Install:
• Dowel pin
1
• O-ring
2
• Crankcase (right)
To crankcase (left).
NOTE:
• Apply the lithium soap base grease on the O-
ring.
• 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:
• Bolt (hose guide)
1
• 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 sur-
face.
9. Apply:
• Engine oil
To the crank pin, bearing and oil delivery
hole.
10. Check:
• Crankshaft and transmission operation.
Unsmooth operation
→
Repair.
T
R
.
.
12 Nm (1.2 m · kg, 8.7 ft · lb)
T
R
.
.
10 Nm (1.0 m · kg, 7.2 ft · lb)