WR400 piston rebore/siezed engine

1 reply to this topic
  • jhdryden

Posted November 10, 2008 - 09:12 AM


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.

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  • Birdy426

Posted November 10, 2008 - 06:16 PM


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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