bmbiff

so awhile ago i smoked a cylinder in my banshee and big bored it when i got it fixed. Got a brand new crank trued and welded, port job, and new cylinder sleeves and pistons. Stock head was cleaned up and milled down also. got the shee back together and running. Noticed a small coolant leak coming from the studs on the top of my head. Took head off first time and found that a stud was loose. Had the shop that did my motor work fix that and put head back on. Now leak isn't as bad but is still evident. Not an actual running leak like before but more of a wetness that occurs around several studs on the head. coolant looked evident in the cylinders. one was nice and clean with an oil film and the other had a patch of carbon builld up on the top of it. Have been told several things like i need to pull all studs and re-seal them back into cylinder because the bore job for new sleeves got into the water jackets. When inspected upon second tear down now appears to not be the problem. can't see any coolant coming from studs. I noticed though that it doesn't seem like the head is sealing down to the cylinder. when taken apart is comes right off instead of peeling it off. tried checking my head with a ruler and also by rubbing it on fine sand paper on a flat surface and haven't really been able to tell if its warped. was thinking if i just get some liquid gasket to help do the job if this would work? shee runs like a raped ape before torn apart again but only been rode 1-2 hours total since rebuild with big bore kit and didn't feel safe running other than just small warm up rides (10-15 min) with coolant leak. anyone seen this before or maybe know whats going on.

haven't had any problems with it running in the cold weather. can start it up and it will almost idle on its own, or you have to keep reving it but after only about a minute or two of that than it will idle fine on its own.

well i might have to try and flush the radiator and get some of that engine ice i have been hearing about. i took of the cover and watched the impellar turn with the machine running so i believe that is alright. guess i'll have to work on that radiator. we do usually stay in lower gears while racing about 3 and 4th, but always have the rpm's running really high.

hi new to the site, i am from midland,MI got some buddies and i that like to race on the ice on a buddies pond, we have an oval track plowed off and we like to race each other or just take practice laps learing the curves. recently got my shee setup for this with studded chin sheng's etc, rejetted for the cold temperatures and have rode it twice with a couple overheating issues. -it overheated, coolant coming out of overflow and can hear it spitting and sputtering, after the first ride after i rode around for about an hour on the ice, parked it let it cool down then rode it again for about half an hour and it was fine. -went back out and rode it at night. let it warm up and did about 10 laps then it was overheating again. let it cool down then fired it up and raced a buddy , after a couple laps it would overheat. have checked old posts but not sure where to start looking. i think or at least thought i have the proper jetting, stock carbs, was running 220's fine in the summer and bumped up to 240's in the winter, also checked the impellar and it was spitting coolant fine. drained radiator and refilled with new coolant. haven't had it back out since yet but needed some feedback. oh also i am running klotz about 50:1 or so, whatever a 16oz. bottle is to 5gallons of gas. oh shee has also had a history of overheating in the summer but only after it has been severely rode the hell out of. like -sand dragging after an 1and half trail ride in 90degree weather -dragging up and down a field constantly for about a half an hr. -suprisingly only about once during a whole weekend of hard dune riding at silver lake in the summer thanks, any help would be appreciated!