Specifications

4.Piston outer diameter measurement:
(1)Measure at the skirt area where is 12 mm from the skirt lower end of skirt.
(2)Limit of use: 50cc-change if when below
39.895mm
(3)Calculate the clearance between the cylinder and piston.
5.Inner diameter measurement of the piston pin hole
Limit of use: change it when over 14.032mm
Limit of use: change it when over 0.100mm