killab18 Posted May 21, 2012 Report Posted May 21, 2012 Hey everyone. for some reason i cant seem to get the search feature to work on this site. I have trie searching but anything i type in, it keeps telling me there are no results. lol Anyway... Im trying to find what the piston ring gaps should be for stock bore. What i have found is to take the stock bore and multiply it by .004. But i found this from a post that a guy had 66.5mm pistons. just want to make sure this is the same for stock pistons. also, should both rings have the same gap?? or should the 2nd ring be a little larger? from what i can see i should have a gap of .010-.012" Just want to make sure its for both rings. Also, what is the torque spec for the head bolts?? THanks guys. Quote
Finch Posted May 21, 2012 Report Posted May 21, 2012 head bolts are 20ftlbs not sure the clearances pic up a clymers it may say also to get around the shitty search function go to google and type in what your looking for ending with banshee hq http://lmgtfy.com/?q=piston+ring+gap+banshee+hq Quote
dirtydownunder Posted May 21, 2012 Report Posted May 21, 2012 you can run both rings the same gap. yes the rule is .003-.004" per inch of bore. some rings you get are larger, so you can just run them, or keep buying rings till you get a tight enough ring gap. (sometimes they come too tight as well and you have to file to size) some run the bottom ring a touch larger. but both the same is fine. Quote
registered user Posted May 21, 2012 Report Posted May 21, 2012 you talking about wiseco rings or some other brand ? wiseco is usually minimum .004 per inch of bore, atleast thats what the instructions said on mine but maybe yours are different. that adds up to minimum .0145 on my bore, the gap was actually about .021 which was fine considering its a modified engine. ring gap typically has a wide window of acceptable clearance, just dont run them too tight or youll have a bad day real fast Quote
killab18 Posted May 22, 2012 Author Report Posted May 22, 2012 no these are for stock rings. OEM yamaha rings. yea im gonna run them at .011" its 100% stock banshee. When i checked the old rings, the gap was HUGE. it was about .34" yea about a 3rd of an inch. So thanks everyone. Quote
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