Piston And Cylinder - HYOSUNG RT 125 D Service Manual

⊙ ⊙ PISTON AND CYLINDER
● Apply MOLY PASTE on the piston pin and small
end of the conrod.
MOLY PASTE
● Place a clean rag over the cylinder base to
prevent the piston pin circlip from dropping into
the crankcase, and then fit the piston pin circlip
with the long-nose pliers.
CAUTION
Use a new piston pin circlip to prevent circlip
failure with a bent one.
NOTE
Install the piston with the punch mark ① ① on the
piston head facing toward the exhaust side.
● Apply the engine oil to the sliding surface of the
piston and big end of the conrod.
● Install the dowel pins ② and new gasket onto 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.
● Tighten the cylinder base nut ③ to the specified
torque.
Cylinder base nut
: 7 ~ 11 N· · m (0.7 ~ 1.1 kgf· · m)
①
②
45
ENGINE 3-22
③