Assembling The Crankcase - Yamaha WR450FB 2012 Owner's Service Manual

3. Check:
• Crankcase
Cracks/damage Replace.
• Oil delivery passages
Obstruction Blow out with compressed
air.
EAS25700

ASSEMBLING THE CRANKCASE

1. Install:
• Oil strainer
• Bearing cover plate
Oil strainer bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Bearing cover plate
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
LOCTITE®
Bearing cover plate (crankshaft)
14 Nm (1.4 m·kgf, 10 ft·lbf)
TIP
• Install the bearing by pressing its outer race
parallel.
• To prevent the bearing cover plate crankshaft
screw "1" from becoming loose, crush the
screw head periphery "a" into the concave "b"
using a punch etc. In so doing, take care not
to damage the screwdriver receiving hole in
the screw head.
2. Thoroughly clean all the gasket mating sur-
faces and crankcase mating surfaces.
3. Apply:
• Sealant
(onto the crankcase mating surfaces)
Yamaha bond No. 1215 (Three
Bond No.1215®)
90890-85505
4. Install:
• Dowel pins "1"
• O-ring "2"
New
• Crankcase (to the left crankcase)
Crankcase bolt
12 Nm (1.2 m·kgf, 8.7 ft·lbf)
TIP
• Apply the lithium soap base grease on the O-
ring.
• 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 positioned at TDC (top dead
center).
• Tighten the bolts in a crisscross pattern in two
(2) stages, with 1/4 turn each.
4
3. M6 80 mm
4. M6 60 mm
5. M6 50 mm
6-66
CRANKCASE
3
5
4
5