I came off a slight hill the other night and punched the throttle, something made a funny noise when my skiis were in the air, then after that I could only go 25 mph or my sled would vibrate really bad, could feel it in my feel on the tunnel and any faster i felt like something was gonna blow. So I looked it over and all bogey bearings etc all seem good, drivers look good (they are 10 tooth 2.52 square toothed drivers) and nothing in the skid seemed to be out of line. I tried to wiggle the driveshaft thinking maybe one of the bearings were bad, but it is solid, maybe the track tension helped to hold it in place though, not sure. Anyway, i took it into the dealership and the mechanic took it for a ride with the belt side panel and cover off. He said the helix was moving all over and back ad forth because one bolt on the back of the secondary was missing and another was lose (referring to the four bolts that tighten into the helix). It has a cudney racing clutch kit on it. I replaced those two bolts with hex heads instead of torque heads so that I could tighten them with a ratcheting wrench, and then took it out for a spin, now i could get to 40 mph before it shook. So not sure whats going on here...everything seems solid?! could 2 hex heads and 2 OEM torque heads in the secondary cause it to be out of alignment or something? any ideas would be appreciated.. thanks! also, the belt only has like 50 miles on it and is not worn at all.