bolt pattern YAMAHA WR 250F 2017 User Guide

CRANKCASE
6-76
2. Check:
• Crankcase
Crack/damage  Replace.
• Oil delivery passages
Obstruction  Blow out with compressed
air.
EAS2GBB315INSTALLING THE OIL SEAL
1. Install:
• Oil seal “1”
(to left crankcase)
EAS2GBB316ASSEMBLING THE CRANKCASE
1. Install:
• Bearing cover plate screw
TIP
Install the bearing by pressing its outer race
parallel.
2. Apply:
• Sealant
(to the crankcase mating surface)3. Install:
• Oil nozzle “1”
• Dowel pin “2”
• Crankcase “3”
(to the left crankcase)
TIP
• Apply the lithium-soap-based 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 top dead center
(TDC).
• Tighten the bolts in a crisscross pattern in two
(2) stages, with 1/4 turn each. Installed depth “a”
4.5–5.0 mm (0.18–0.20 in)
Bearing cover plate screw
12 Nm (1.2 m·kgf, 8.7 ft·lbf)
LOCTITE®
Bearing cover plate screw (crank-
shaft)
22 Nm (2.2 m·kgf, 16 ft·lbf)
LOCTITE®
Yamaha bond No. 1215
90890-85505
(Three bond No.1215®)
New
a 1
T R..
Oil nozzle bolt
5 Nm (0.5 m·kgf, 3.6 ft·lbf)
LOCTITE®
Crankcase bolt
12 Nm (1.2 m·kgf, 8.7 ft·lbf)
T R..
T R..