Installing The Piston And Piston Ring; Installing The Crankshaft - Yamaha MZ360 Service Manual

PISTON, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
1
2
3
1 3
a
2
c
3
90˚
a
45˚
d
90˚

INSTALLING THE PISTON AND PISTON RING

1.
Install:
• Top ring "1"
• 2nd ring "2"
a
• Oil ring "3"
TIP
• Be sure to install the top ring and 2nd ring so that the
"R" mark "a" faces toward the piston head.
• Make sure that the piston rings move smoothly.
1
2
3
2.
Apply the engine oil to the inside of the connecting rod
small end.
3.
Install:
• Piston "1"
• Piston pin "2"
b
• Piston pin circlips "3"
TIP
• Make sure that the "YAMAHA" mark "a" on the con-
necting rod faces toward the crankcase cover.
• Make sure that the " " mark "b" on the piston head
faces toward the push rod.
1
• Install the piston pin circlips so that the clip ends are
45 "c" or more from the cutout in the piston.
2

INSTALLING THE CRANKSHAFT

1.
Make sure that the end gap of each piston ring is
positioned correctly, as shown in the illustration.
b
a. Lower oil ring rail
b. 2nd ring
90˚
c. Upper oil ring rail
d. Top ring, oil ring expander
c
3-57
New
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