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8. CYLINDER/PISTON ATV 150/125
PISTON INSTALLATION
Remove any gasket material from the
crankcase surface.
Be careful not to drop foreign matters
into the crankcase.
Install the piston, piston pin and a new Piston
piston pin clip.
· Position the piston "IN" mark on the
intake valve side.
· Place a clean shop towel in the
crankcase to keep the piston pin clip
from falling into the crankcase.
Piston Pin Clip Piston Pin
CYLINDER INSTALLATION Cylinder
Install the dowel pins and a new cylinder
gasket on the crankcase.
Coat the cylinder bore, piston and piston
rings with clean engine oil.
Carefully lower the cylinder over the piston
by compressing the piston rings.
· Be careful not to damage or break the
piston rings.
· Stagger the ring end gaps at 120° to the
piston pin.
Gasket
Install the cam chain tension.
Tighten the cam chain tension bolts.
Bolts
8-9