Hiflyer I may have confused things a bit by chiming in, but I will try and clear things up. I have the 162 with the shockwave and I have no belt issues. Nytro907 has the stock track and has belt issues, last winter we both ran the same setup, same turbo, same sled, same clutching, no belt issues. This year 907 nytro starts showing threads and breaking belts, so we start to change one thing at a time, we start with a new primary spring, the next week a artic cat green secondary spring, the next week 14.5mm rollers, next week he has the alignment checked at northen power sports and have them look it over, we check the clutchs for scratches,etc. So his next plan is going to be to try the shockwave. It is just strange that all last winter he ran the clutchs with only supertips and had no belt issues, I know the springs wear out and we changed them, but we are making one change at a time to try and get this figuered out. BTW we will both be at A man, we should go for a ride.