Sym PA12B Service Manual page 122

Measure the outer diameter of piston pin.
Caution
Measure the piston outer diameter in the
direction perpendicular to the piston pin
axis.
Service limit：55.87mm
Compare the measured value with service
limit to calculate the clearance between the
piston and cylinder.
Measure the piston ring thickness.
Service limit：1.46mm
To this chapter contents
8. Cylinder / Piston
8-7