Hi everyone!

Bring this topic back to try to find out which in the biggest piston available for my MC 21.

The manual says there´re three sizes: B - 53.966~53.969mm
No# - 53.962~53.965mm
C - 53.958~53.961mm

I don´t know if this is right, as it´s the first time I´ve seen this system, usually the A piston is always the smallest.

The other strange thing is that I´ve found these pistons in the parts list: B piston 13102-KV3-830
No# piston 13103-KV3-830
D piston 13104-KV3-830

Does anyone know the reason of this difference and/or the real sizes of the pistons in the parts list? I need to fit the biggest ones as my cylinders are close to the wear limit.

Thanks a lot!!!
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Two Stroke Power