Cylinder Assembly And Installation - Yamaha YZ450F(W) Owner's Service Manual

Table of Contents

CYLINDER AND PISTON

2. Position:

Offset the piston ring end gaps as shown.

a Top ring end

b 2nd ring end

c Oil ring end (upper)

e Oil ring end (lower)

• Piston pin 2

• Piston pin clips 3

• Apply engine oil onto the piston pin and pis-

• Be sure that the arrow mark a on the piston

points to the exhaust side of the engine.

• Before installing the piston pin clip, cover the

crankcase with a clean rag to prevent the

piston pin clip from falling into the crankcase.

• Install the piston pin clips with their ends fac-

ing downward.

4. Lubricate:

• Piston rings

Apply a liberal coating of engine oil.

• Dowel pins

• Cylinder 2

Install the cylinder with one hand while com-

pressing the piston rings with the other hand.

• Pass the timing chain 3 through the tim-

ing chain cavity.

• Be careful not to damage the timing chain

guide 4 during installation.

• Bolt (cylinder)

10 Nm (1.0 m · kg, 7.2 ft · lb)