I dont get into snowmobiling as much as I used to but the neighbor is giving me some ribbing about how his 99 Yamaha 600sx is faster than my Polaris. Im just curious how this is gonna go as I am riding with him this sat. His is as near as I remember 99 Yamaha sx600. I know the clutch is stock and he has no studs but prolly jetted and I think still stock or gutted exhaust at the most. Mine is a 99 Indy 600 w SLP pipe rejetted and 144 studs. It has a custom clutch kit in it that is from a local clutch wizard. Similar to a RB 5th gear clutch kit as I recall. The other rider is a little guy about 70lbs lighter than me. Hows this gonna go? Thanks