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Post by morgy on Jun 16, 2019 9:49:49 GMT 1
Hi Do standard Yamaha piston all have the Arrow, Letter L and the size ID on the piston crown? I've seen a set that have 25 on them.. I would have thought it would either be .25 or 0.25 or 2.5 but i can't see any decimal point anywhere.. owner is saying the bore sizes are 64,3 up to 64,4mm piston by mark morgan, on Flickr
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Post by midlifecrisisrd on Jun 16, 2019 12:54:34 GMT 1
25 is 0.25mm over
If he's measuring 64.3- 64.4 I'd say it also needs bored
2.5mm over would have 250 on them
Steve
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