Yamaha MX800V - Installing the Crankshaft

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ENGINE
PISTONS, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
INSTALLING THE CRANKSHAFT
1. Make sure that the end gap of each piston ring is
positioned correctly, as shown in the illustration.
2. Install:
• Piston with the connecting rod “1”
3. Attach:
• Piston ring compressor “1”
TIP
Attach the piston ring compressor to the piston, and then
insert the piston into the cylinder.
4. Check:
• Piston #1 with the connecting rod #1 “1” position
TIP
• Make sure that the “ ” mark “a” on the piston #1 head
faces toward the flywheel.
• Make sure that the “7UD” mark “b” on the connecting rod
#1 faces toward the crankcase cover 1.
45˚
90˚
90˚
90˚
a
bc
d
a. Top ring, oil ring expander
b. Lower oil ring rail
c. 2nd ring
d. Upper oil ring rail
1
1
Piston ring compressor:
YM-08037
a
1
1
b