Cylinder Head Installation - Sym Mio 50 Service Manual

Assembly the cylinder head.
Caution
The tangent of rocker shaft of intake valve
should match with the bolt hole of camshaft
mounting seat.

Cylinder Head Installation

Install the lock pins and new cylinder head gasket
onto the cylinder.
Install the camshaft chain plate.
Tighten the cylinder head nuts (4 nuts)
At first, tighten the 4 nut on the cylinder top and
then tighten the 2 bolts on the left side of cylinder
head.
With T type wrench to turn crankshaft in a
clockwise motion so that the "T" mark on the
generator 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.
(bolts x2)
Torque value: 1.8~2.2kgf-m
Install the spark plug and tighten it.
Torque value: 1.0~1.4kgf-m
Caution
Apply with oil onto the thread of cylinder head
bolts and tighten the bolts in diagonally for
2-3 sequences.
Do not over tightening the bolts to avoid the
cylinder head deformation, noise created or
leaking so that effects motorcycle's
performance.
To this chapter contents
Lock pins
4 Nuts
6. Cylinder Head / Valve
Chain plate
1 bolt
Timing mark
Gasket
2 bolts
6-15