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jhdryden

WR400 piston rebore/siezed engine

2 posts in this topic

Can anyone please tell me if I can rebore or only replate. Basically had one shop tell me that I can't rebore, but another shop offered me a 94mm piston kit, which would imply that one could as the standard piston is 91.8mm

I've got score marks on the piston and cylinder, but not that deep.

Cheers

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You can bore oversize (big bore kits), ut must replate after the bore. For me, it was cheaper to buy a big bore kit from Lukes Racing (or Eric Gorr's forward motion) than to replate and buy a new piston.

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