2013 800 155. I put 350 miles on original 115 belt, looks great. I put on a xs809 to break it in as a spare, got 3rides on it, the first being a pretty easy break in ride, and at the end of the third ride it has pulled cords on both sides of the belt. My question is what would cause this? Sheave clearance? I set it at 25-27 thous, was this not enough? I can check my alignment, but it has been right on previously. Motor mounts? Sled has about 500 miles.