Installing The Oil Seal; Assembling The Crankcase - Yamaha YZ250F(E) Owner's Service Manual

INSTALLING THE OIL SEAL

EAS1SM1282
1. Install:
• Oil seal "1"
New
(to left crankcase)
Installed depth "a"
4.5–5.0 mm (0.18–0.20 in)
1
a

ASSEMBLING THE CRANKCASE

EAS1SM1283
1. Install:
• Bearing cover plate screw
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®
TIP
Install the bearing by pressing its outer race
parallel.
2. Apply:
• Sealant
(to the crankcase mating surface)
Three Bond No.1215®
90890-85505
3. Install:
• Dowel pin "1"
• Crankcase (to the left crankcase)
Crankcase bolt
12 Nm (1.2 m·kgf, 8.7 ft·lbf)
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.
4
3
a
4
3
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
5-65
CRANKCASE
b
3
5
3
5
5
3