Assembly And Installation - Yamaha YZ-Serie Fahrer- Und Wartungshandbuch

CYLINDER HEAD, CYLINDER AND PISTON
5PA40620
5PA40630
NOTE:
When you purchase a cylinder, you cannot
designate its size. Choose the piston that
matches the above chart.

ASSEMBLY AND INSTALLATION

Piston ring and piston
1. Install:
Piston ring 1
G
NOTE:
Take care not to scratch the piston or dam-
G
age the piston ring.
Align the piston ring gap with the pin 2.
G
After installing the piston ring, check the
G
smooth movement of it.
2. Install:
Gasket (cylinder) 1
G
Small end bearing 2
G
Dowel pin 3
G
NOTE:
Apply the engine oil on the bearing (crank-
G
shaft and connecting rod) and connecting
rod big end washers.
Install the gasket with the seal print side
G
toward the crankcase.
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ENG