Yamaha YZ250FX 2021, Owner'S Service Manual

Page: 255 / 378

CRANKCASE
5-69
EAM30152
ASSEMBLING THE CRANKCASE
1. Install:
•
Oil seal “1”
(to the left crankcase)
2. Install:
•
Bearing cover plate
TIP
Install the bearing by pressing its outer race par-
allel.
3. Apply:
• Sealant
(to the crankcase mating surface)
4. Install:
• Oil nozzle “1”
•
Dowel pin “2”
• Crankcase “3”
(to the left crankcase)
TIP
• 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
stages, with 1/4 turn each.
Installed depth “a”
4.5–5.0 mm (0.18–0.20 in)
Bearing cover plate
12 N·m (1.2 kgf·m, 8.9 lb·ft)
LOCTITE®
Bearing cover plate (crankshaft)
22 N·m (2.2 kgf·m, 16 lb·ft)
LOCTITE®
Yamaha bond No. 1215
90890-85505
Three bond No. 1215®
Ne w
a
1
T
R
.
.
Oil nozzle bolt
5 N·m (0.5 kgf·m, 3.7 lb·ft)
LOCTITE®
Crankcase bolt
12 N·m (1.2 kgf·m, 8.9 lb·ft)
4. 45 mm (1.77 in)
5. 60 mm (2.36 in)
6. 75 mm (2.95 in)
T
R
.
.
T
R
.
.
5
6
4
5
4
4
4
2
3
1
2
LT
5
6
6