Yamaha YZ450F(S), Owner'S Service Manual

Page: 424 / 642

4 - 93
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 (crankcase)
NOTE:
Tighten the crankcase tightening bolts in
stage, using a crisscross pattern.
7. Install:
●
Oil delivery pipe 2
●
O-ring
●
Bolt (oil delivery pipe 2)
8. Install:
●
Timing chain
●
Timing chain guide (rear)
●
Bolt (timing chain guide)
9. Remove:
●
Sealant
Forced out on the cylinder mating surface.
10. Apply:
●
Engine oil
To the crank pin, bearing and oil deliv-
ery hole.
11. Check:
●
Crankshaft and transmission operation.
Unsmooth operation
→
Repair.
T
R
.
.
12 Nm (1.2 m · kg, 8.7 ft · lb)
New
T
R
.
.
10 Nm (1.0 m · kg, 7.2 ft · lb)
T
R
.
.
10 Nm (1.0 m · kg, 7.2 ft · lb)