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240 Piston info required


prelit
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Hi guys,

Can anyone help me with the standard piston bore size of the 240 (212cc) engine to the nearest mm. 

if anyone has a scrap piston available and has time I would also like to know the gudgeon pin diameter, crown height from pin center to piston crown

and the overall piston height. These can be just a ruler measurement. 

Thanks in advance,

Prelit

Edited by prelit
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Thanks Midlife for taking the time to measure those dimensions for me.

I believe the the Fantic barrel was plated, has anyone got any experience with running the piston in a cast iron liner. I guess in theory the piston ring wouldn't be 100% compatible but 

can you get away with it?  I bit of premature wear doesn't bother me.

Cheers,

Prelit.

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Chrome rings will be shiny just like chrome. Plain rings will be greyish to polished grey where they rub against cylinder wall. Chrome bore will be easy to spot as it will be much shinier than cast iron bore. You will also see where the plating finishes on the bottom of the barrel/bore. Obviously chrome bores cannot be bored out, unlike a cast bore which can be oversized by reboring. Nikasil and other types of surface hardening processes are harder to define, try a Google search ?

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