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Old 12-27-2010, 06:36 PM
dgcantrellsr dgcantrellsr is offline
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Wouldn't it be more feasible to order oversize and have it bored, if the pistons are wore I would assume the bore is also.

Originally Posted by Marshmellow
My 1st thread here, be easy on me for asking the questions I do. :-)

So I'm actually working on replacing the Pistons on a old 4 Stroke 400CC Bike engine, the previous pistons are well over the wear mark. Upon looking up for replacement pistons sadly I came to know none of the manufacturers make the pistons I'm looking for anymore, wiseco etc.

So now the best replacement pistons I have found from a different bike engine look to be identical EXCEPT the pin to deck height which is a mm shorter than the original stock pistons. I can make up for the difference of height by shaving either the bottom base of the cylinder or the head gasket surface area. Now I'm just unsure if it will cause any issues in the stroke or performance. Also if I can go ahead with the shave idea, what would you recommended to shave, the base of the cylinder or the top?

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