Installing The Crankshaft - Yamaha EH63 Service Manual

PISTONS, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
b
1
2
3
4
5
b
6
7
#1
8
9
10
a
1
1
1
3
a
2
c
#2
b
c
3.
Install:
• Piston "1"
• Piston pin "2"
• Piston pin circlip "3"
TIP
• For the EH63K/EH64A/EH64K/EH65A/EH65B, install
so that the assembly direction mark "a" side faces the
flywheel side.
• There is no installation direction mark on the EH72A/
EH72B/EH72K, and either side of the piston may face
the flywheel side.
• Install the piston pin circlips so that the clip ends are
45 "b" or more from the cutout in the piston.
• For the piston to be installed on cylinder #1, install so
that the number "1" "b" on the connecting rod faces the
crankcase cover side, and for the piston to be installed
on cylinder #2, install so that the number "2" "c" on the
connecting rod faces the crankcase cover side.

INSTALLING THE CRANKSHAFT

1.
Make sure that the end gap of each piston ring is
positioned correctly, as shown in the illustration.
a. Top ring
b. 2nd ring
c. Oil ring
2.
Install:
• Piston with the connecting rod "1"
3.
Attach:
• Piston ring compressor "1"
Piston ring compressor:
90890-05158, YM-08037
TIP
Attach the piston ring compressor to the piston, and then
insert the piston into the cylinder.
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