Installing The Pistons And Piston Rings - Yamaha EH63 Service Manual

PISTONS, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
1
2
2
1
a
2
3
1.
Place a piece of Plastigauge® "1" on the crank pin
horizontally.
TIP
Wipe off oil thoroughly from the crankshaft, connecting
rod, and connecting rod cap.
2.
Install:
1
• Connecting rod "1"
• Connecting rod cap "2"

INSTALLING THE PISTONS AND PISTON RINGS

The following procedure applies to all of the pistons and
piston rings.
1.
Install:
• Top ring "1"
2
b
• 2nd ring "2"
• Oil ring "3"
TIP
• Be sure to install the EH63K/EH64A/EH64K/EH65A/
EH65B 2nd ring so that the "R" mark "a" faces toward
the piston head.
1
• Be sure to install the EH72A/EH72B/EH72K 2nd ring
so that the "N" mark "b" faces toward the piston head.
2
• Make sure that the piston rings move smoothly.
3
2.
Apply the engine oil to the inside of the connecting rod
small end.
Connecting rod cap bolt:
25 N·m (2.5 kgf·m, 18 lb·ft)
3-59
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