Piston Ring Installation - Sym Joyride 125 Service Manual

8. Cylinder / Piston
Measure the piston outer diameter.
Caution
The measurement position is 10 mm
distance from piston bottom side, and 90°
to piston pin.
Service limit:
LA18W: 60.9 mm
Compare measured value with service limit to
calculate the clearance between piston and
cylinder.

Piston Ring Installation

Clean up piston top, ring groove, and piston surface.
Install the piston ring onto piston carefully.
Place the openings of piston ring as diagram shown.
Caution
Do not damage piston and piston rings as installation.
All marks on the piston rings must be forwarded to up side.
Make sure that all piston rings can be rotated freely after installed.
Top groove
nd
2 groove
Oil groove
8-6
To this chapter contents
Top ring
nd
2 ring
Oil ring