Ahhh, yes brings back memories ---- bad ones LOL. I had an 87 and my brother had an 86. Both of them snapped the cranks at about 5,000 miles. It starts out with a rattle sounds like the clutch is coming apart and a liitle while later the whole engine is junk. I know it happened to us twice. I think it is an oiling problem, the crank pins on both of our sleds was blue. I got cat to pay for half of the parts which was around $500.00. I needed a cylinder and a head and a piston along with th crank and other things. This was around 1993 I think, but am not positive. I was surprised cat even helped. Kevin