Cylinder Head Installation - Sym GTS 250 Service Manual

6. Cylinder Head / Valve
Install camshaft into cylinder head.
Install valve rocker arm, rocker arm shaft and cam
shaft setting plate.

Cylinder Head Installation

Clean up all residues and foreign materials onto
the matching surfaces of both cylinder and
cylinder head.
Install chain guide, dowel pins and a new cylinder
head gasket onto the cylinder.
Caution
Do not damage the matching surfaces of cylinder
and cylinder head.
Avoid residues of gasket or foreign materials
falling into crankcase as cleaning.
Install 4 washers and tighten 4 nuts on the cylinder
head upper side, and then tighten 2 cylinder head
mounting bolts of cylinder head right side.
Torque value:
Nut 3.6~4.0kgf-m
Bolt 1.0~1.4kgf-m
Install cam chain on to sprocket and align the
timing mark on the sprocket with that of cylinder
head.
Align sprocket bolt hole with camshaft bolt hole.
Tighten the sprocket mounting bolts.
Caution
Make sure timing marks are matched.
6-14
To this chapter contents
2 bolts
Bolt ×2
Cam shaft setting plate
Chain guide
Dowel pins
Timing mark
2 bolts
Gasket
4 nuts