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Posted

i was wondering how big you can bore the stock banshee cylinders and still keep it reliable?

i know stock is a 64mm.

 

There are mixed opinions on this. Some will tell you .080" others will tell you .100"

Posted

I see no problem with .100 (2.5mm). You dont bore for power, you bore the minimum just to clean up the cylinder walls when necessary so the way I see it is if you have a set thats punched .080 and needs a bore why not go to .100, thats alot more riding time on that set of cylinders before you need to resleeve or junk them(could be several years if maintained). I guess it all depends on if you want to buy the .100 pistons vs different jugs and pistons. Does the greater piston surface produce more heat on the cylinder walls? Yes it does but I feel there are other ways to deal with that. Just my opinion .

Posted

i agree with crusty. but i would add that it depends on how you ride. if you ride extremely hard high rpm's wot then you may want to be more cautious when it comes the how thin your cylinder walls are. personally i would go .100 over but that is because i have a backup top end and i dont generally turn really high rpms. just my opinion tho

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