bolt pattern YAMAHA YZ250F 2016 User Guide

CRANKCASE
5-65
EAS1SM9280INSTALLING THE OIL SEAL
1. Install:
• Oil seal “1”
(to left crankcase)
EAS1SM9281ASSEMBLING 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:
• Dowel pin “1”
• Crankcase “2”
(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
10 Nm (1.0 m·kgf, 7.2 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..
Crankcase bolt
12 Nm (1.2 m·kgf, 8.7 ft·lbf)
3. 45 mm (1.77 in)
4. 60 mm (2.36 in)
5. 75 mm (2.95 in)
a. Hexagon socket head bolt without flange
b. Hexagon socket head bolt with flange
T R..
4
5
3
43
335 5 5
3
ab1
1
2