Yamaha YZ450F 2021 - Assembling the Crankcase

CRANKCASE
5-67
EAM30152
ASSEMBLING THE CRANKCASE
1. Install:
• Oil seal “1”
(to 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
• 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”
0.0–0.5 mm (0.00–0.02 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)
Yamaha bond No. 1215
90890-85505
(Three bond No.1215®)
New
1
a
T
R
.
.
Oil nozzle bolt
10 N·m (1.0 kgf·m, 7.4 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
55
4
4
4
6
2
3
1
2
LT
5
6