Yeah i actually had this stripped threading in the crankcase since i went and replaced my first head gasket and surprisingly the next one didn't blow for like 2- 3 weeks! But it did recently but i ordered copper plates .020" thick cut to the same dimension of the head gasket. I then drilled holes for the head studs and was left with the big: How am i going to drill the middle hole for the piston? Well i have no tools, so i drew the circle and sanded it with a Dremel for a few hours until i got the desired size hole. The gasket is now on but the thread it even worst then before and squealing like crazy. But the compression even with the larger leak seemed better then ever (but i'm not using it until i fix the thread in the crankcase). So i have the Grubee GT2 with the 6m studs and also got the SBP studs (they are nice) and i ordered the Heli coil 6m kit (i hope it has a tap with it cause the kit claims to have every thing you need for the job [it better]). I was wondering if that was the correct Heli Coil kit for a 6m stud (i mean it should right)? Thanks guysWhile you have things taken apart you might think about upgrading your hardware I don't know if they make stronger head bolts, but I think they do. (check Sick Bike Parts)
What I did to take out other bolts was to double bind one nut on another and use the bottom one to unscrew the bolts for my the intake and exhaust hardware.
One more thing to watch out for is to see that you get a new bottom end gasket and check to make sure that the bottom is well sealed. I had a leak in mine and it made a big mess until I got it fixed.
Mike