SheeMale98 Posted May 2, 2013 Report Share Posted May 2, 2013 Whats up fellas (And ladies) New to the forum here. Picked up a 98 Banshee a couple of months ago for CHEAP. The guy had it for a while but bought it like it was. Anyways, it didnt run when i got it. Reeds were broken, carbs all junked up yada yada yada. Bought new reeds and cleaned the carbs and walah!! Ran great but needed to be jetted. Jetted it and took her for a quick rip and holy shit it wasnt like anything ive ever ridden before. Buuuuut the fun had to end there as the headgasket started leaking right after. So i pull the head and low and behold a stripped headstud...AWSOME! So i fix the headstud and measure the bore and it comes out to be 2 11/16 which is 68.xxx mm if i did the math right. And the pistons have .50 on top of them. Did some research and from what i gathered, 68mm=392? Current headgasket measures out at .50 thick and the 2 3/4 inches across. Im so damn confussed as to what headgasket im supposed to buy. Engine mods are (as much as i know, ive found alot of "extras" on this bike since ive bought it) Stock head milled to 20cc and jugs milled .35 with slight port work. If anyone can shed some light on this situation i would really apreciate it! Thanks! Quote Link to comment Share on other sites More sharing options...
VoOK Posted May 2, 2013 Report Share Posted May 2, 2013 oem head gaskets are best in my opinion. I recently did a rebuild and used an aftermarket......it leaked. Bought an oem gasket and the bike ran great. Quote Link to comment Share on other sites More sharing options...
Phelps Posted May 2, 2013 Report Share Posted May 2, 2013 post all the numbers on top of the piston. more than likely it is a .5 over piston which would make it a 64.50 bore if it had a stock head gasket and it wasn't trimmed then it's probably not a 68mm bore. you can run a stock head gasket on a 68mm bore, but it will need to be trimmed. done it in a pinch before. Quote Link to comment Share on other sites More sharing options...
SheeMale98 Posted May 2, 2013 Author Report Share Posted May 2, 2013 No other numbers on the pistons besides 0.50. Quote Link to comment Share on other sites More sharing options...
Starwriter Posted May 2, 2013 Report Share Posted May 2, 2013 Harbor Freight has digital calipers for $20. Quote Link to comment Share on other sites More sharing options...
SheeMale98 Posted May 2, 2013 Author Report Share Posted May 2, 2013 I have calipers Quote Link to comment Share on other sites More sharing options...
Starwriter Posted May 2, 2013 Report Share Posted May 2, 2013 I have calipers Digital calipers? If so, why are you measuring it in fractional inches and doing math to convert it to mm? Quote Link to comment Share on other sites More sharing options...
SheeMale98 Posted May 2, 2013 Author Report Share Posted May 2, 2013 No not digital. Was getting to many different measurements due to the jungle gym of studs, wires and anything else that is in the way of getting a perfect measurement. And on top of the fact my caliper is about 10 years older than I am. Quote Link to comment Share on other sites More sharing options...
Phelps Posted May 2, 2013 Report Share Posted May 2, 2013 probably just 64.50 pistons then..... buy a oem gasket and put it back together. Quote Link to comment Share on other sites More sharing options...
Starwriter Posted May 2, 2013 Report Share Posted May 2, 2013 Need to measure a piston? Grab the digital calipers. Need to measure a metric bolt for diameter and length? Grab the digital calipers. Need to convert 22mm to inches? Grab the digital calipers. Want to know the difference in size between part A and part B? Grab the digital calipers. Want to measure transfer port heights? Grab the digital calipers. Want to measure shim thicknesses? Grab the digital calipers. Quote Link to comment Share on other sites More sharing options...
SheeMale98 Posted May 2, 2013 Author Report Share Posted May 2, 2013 I understand that...but I didn't have any so I used the tools I had available. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted May 2, 2013 Report Share Posted May 2, 2013 Wait, your name is shemale?.... 1 Quote Link to comment Share on other sites More sharing options...
sprinklerman Posted May 2, 2013 Report Share Posted May 2, 2013 Wait, your name is shemale?.... ^^^^ This. Quote Link to comment Share on other sites More sharing options...
m671054 Posted May 3, 2013 Report Share Posted May 3, 2013 Nobodys had a set of dgital calipers fuck up on them yet? i agree they are convienient but ive had 2 of them fuck up on me now what ever is inside them slips and it becomes inaccurate while sliding. you can re zero it and it will work fine but once in a while it slips. really been thinking about going old school. Quote Link to comment Share on other sites More sharing options...
SheeMale98 Posted May 11, 2013 Author Report Share Posted May 11, 2013 Little update. Ordered a OEM head gasket like some of you suggested and that was a big no go. The gasket hung way over into the bore. And was only 12 thousandths thick (used my calipers for that :-p). So I would have had waaaay high compression with the head being milled so much. Ordered a 68mm .43 head gasket from bansheedepot.com and worked perfect. Still confused about the .50 stamped on top of the pistons. Quote Link to comment Share on other sites More sharing options...
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