help with piston size

[epod]

hi all can some one tell me what size piston to replace mine with here we go the pistons i took out had 100 stamped on the top.so do i get a set of 65m pistons because 64 is standed.I have looked at the charts and im confused. thanks im trying to upload picture but it says image to big

 

[sleeper06]

Post pics could be 1mm over or something else plus before ordering anything someone should bor guage those cylinders so you know if it's outta round or a quick hone might suffice

[epod]

right iv messured the piston it says 64.48 the jugs 64.80 it wont let me upload pic

Edited November 17, 2014 by epod

[tfaith08]

Send it to a reputable builder.  They can gauge the bore, order the pistons, bore the cylinder to the pistons, chamfer the ports, and hone the cylinder correctly.  Anyone who doesn't specialize in 2-strokes is likely to screw you up, whether intentional or not.