To all senior riders, recently due to some unforeseen circumstances, I had to change my Cylinder, Piston & Piston Ring. I went to my agents to enquire some details. To my findings in the parts catalog, I realised tat they have 3 types of cylinder & piston. It is as follows:

Cylinder A - Piston A
Cylinder B - Piston B
Cylinder C - Piston C

What's the difference between A, B, C?