Sym ALA125CC Manual page 156

7. CYLINDER/PISTON
PISTON INSTALLATION
Install piston and piston pin, and place the IN
mark on the piston top side forward to intake
valve.
Install new piston pin snap ring.
Caution
Do not let the opening of piston pin snap
ring align with the opening piston ring.
Place a piece of cleaning cloth between
piston skirt section and crankcase in
order to prevent snap ring from falling
into crankcase as operation.
CYLINDER INSTALLATION
Clean up all residues and foreign materials
on the matching surface of crankcase.
Pay attention to not let these residues and
foreign materials fall into crankcase.
Caution
To soap the residues into solvent so that
the residues can be removed more
easily.
Install 2 lock pins and new gasket.
Coat engine oil to inside of cylinder, piston
and piston rings.
Care to be taken when installing piston into
cylinder. Press piston rings in one by one as
installation.
Caution
Do not push piston into cylinder forcefully
because this will cause the piston and the
piston rings to be damaged.
Install the cam chain plate, the cylinder
gasket and lock pins.
Install cylinder head. (refer to Chapter 6)
Install the cam chain auto-adjuster. (2 bolts)
7-8
IN mark
Piston pin
Piston
SYM
2 bolts