HYOSUNG MS3 250 Sercie Manual page 85

◉ ◉ PISTON AND CYLINDER
● Apply MOLY PASTE on the piston pin and small
end of the conrod.
MOLY PASTE
NOTE
Install the piston with the punch mark ① ①
piston head facing toward the exhaust side.
● Place a clean rag over the cylinder base to pre-
vent the piston pin circlip from dropping into the
crankcase, and then fit the piston pin circlip with
long-nose pliers.
CAUTION
Use a new piston pin circlip to prevent circlip fail-
ure with a bent one.
● Apply engine oil to the sliding surface of the piston
and big end of the conrod.
● Install the dowel pins ②
the crankcase.
CAUTION
Use a new gasket to prevent oil leakage.
● Hold each piston ring with the piston ring sections
positioned correctly and put it into the cylinder.
Make sure that the piston rings are caught by the
cylinder skirt.
NOTE
When mounting the cylinder, after attaching the
cam chain, keep the cam chain taut.
The cam chain must not be caught between the
cam chain sprocket and crankcase when the
crankshaft is rotated.
on the
and new gasket ③ onto
②
ENGINE 3-42
①
③