Operation Manual

4-55
CRANKCASE AND CRANKSHAFT
3. Install:
• Oil strainer "1"
• Bolt (oil strainer) "2"
4. Apply:
• Sealant
On the right crankcase.
Clean the contacting surface of left
and right crankcase before applying
the sealant.
5. Install:
• Dowel pin "1"
• Right crankcase
To left crankcase.
• Fit the right crankcase onto the left
crankcase. Tap lightly on the case
with soft hammer.
• When installing the crankcase, the
connecting rod should be posi-
tioned at TDC (top dead center).
6. Tighten:
• Bolt (crankcase)
Tighten the crankcase tightening
bolts in stage, using a crisscross pat-
tern.
7. Install:
• Timing chain
• Timing chain guide (exhaust side)
• Bolt for timing chain guide (ex-
haust side))
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 op-
eration.
Unsmooth operation → Repair.
Bolt (oil strainer):
10 Nm (1.0 m•kg, 7.2
ft•lb)
YAMAHA Bond No. 1215
(ThreeBond
®
No.1215):
90890-85505
Bolt (crankcase):
12 Nm (1.2 m•kg, 8.7
ft•lb)
Bolt for timing chain
guide (exhaust side):
10 Nm (1.0 m•kg, 7.2
ft•lb)