Sym ALA125CC Manual page 147

SYM
CYLINDER HEAD INSTALLATION
Install the lock pins and new cylinder head
gasket onto the cylinder head.
Install the camshaft chain plate.
Install the cylinder head.
CAMSHAFT INSTALLATION
Assemble the camshaft holder.
Install the exhaust valve rocker arm set onto
the camshaft holder showing "EX" mark.
Install intake valve rocker arm and rocker
arm shaft.
Caution
The tangent of rocker shaft of intake
valve should match with the bolt hole of
camshaft mounting seat.
With T type wrench to turn crankshaft in a
clockwise motion so that the "T" mark on the
flywheel aligns with the mark on crankcase.
(piston is at TDC position)
Place the TDC marks of the cam sprocket at
same level of the top-end of cylinder head.
The other single hole of the cam sprocket is
in upward. Then, install the cam chain onto
the cam sprocket.
6. CYLINDER HEAD/VALVE
Lock pins
5mm blot
Rocker
arm shaft
Camshaft
Cam chain
Cylinder head gasket
Chain plate
Rocker arm
6-13