I just took my sled in for the recent service bulletin that came out for the new torque specs and jack shaft check on the pro. Now that we traveled all the way from MN to CO to ride we get onto the trail and ride about 4 miles when I give my sled a little throttle on a hump along the trail and All of the sudden it revs high, and the power doesn't go to the track. I take off the side panel only to see my QD belt laying there off of the sprockets, but not broken. We managed to get it back on to the sled but it would work itself about half way off of the sprockets in a matter of 20 feet, then it's stayed there enough for me to limp it back. Any suggestions? I think the dealer messed something up. Maybe put it on backwards? I don't know, I've never heard of this happening.