Well my 97 Sportsman had lost compression and when I pulled the top end....most of the skirt is GONE....I mean GONE....not a trace of any pieces in the crankcase, Cyl is scratched up alittle but 99% cleaned up with a hone. measures out at 3.271 so I lost .001, cheap STD kit to go back in with hopes everything else is ok. never used any coolant, or run hot. with only 1700 miles I need to find the original problem before sinking major money in a rebuild. Its been used more for utility work around the property with some mild riding. Anyone have some input or things to look for.