Yamaha YZ450F(D) Owner's Service Manual page 105

3. Install:
• Piston "1"
• Piston pin "2"
• Piston pin clip "3"
• Apply engine oil onto the piston.
• Apply molybdenum disulfide oil
onto the piston pin.
• Install the piston with the F mark "a"
on it pointing to its intake (front)
side.
• Before installing the piston pin clip,
cover the crankcase with a clean
rag to prevent the piston pin clip
from falling into the crankcase.
INSTALLING THE CYLINDER
1. Install:
• Dowel pins
• Cylinder gasket "1"
• Cylinder "2"
Install the cylinder with one hand
while compressing the piston rings
with the other hand.
• Pass the timing chain "3"
through the timing chain cavity.
• Be careful not to damage the tim-
ing chain guide "4" during instal-
lation.
2. Install:
• Bolt (cylinder)
Bolt (cylinder):
10 Nm (1.0 m•kg, 7.2
ft•lb)
CYLINDER AND PISTON
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