Sym SYM series, Manual, Page: 145 / 178

6. CYLINDER HEAD/VALVE SYM
6-12
Use valve spring compressor to press valve
spring.
Install valve split locks and release the valve
compressor.
Caution
Special tool: valve spring compressor
Tap valve stem to make valve retainer and
valve stem sealing properly.
Caution
CYLINDER HEAD INSTALLATION
Install the lock pins and new cylinder head
gasket onto the cylinder head.
Install the camshaft chain plate.
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.
Install the cylinder head.
In order to avoid to loosing spring tension,
do not compress the spring too much. Its
length is based on the installation of latch.
Place and hold cylinder head on to working
table so that can prevent from valve
damaged.
Lock pins
Cylinder head gasket
Chain plate