with my old clutch, my jag would hit 75 in the fields, with the new clutch (primary), it tops out at 50. After 100 or so miles, she tops out at 40mph! I don't know what is going on here, It doesn't like to spin the track, barely moves. Doesn't like to climb hills as nearly as it used too, sounds like a truck in first gear. I don't think that the belt is going down far enough in the secondary. 5800 miles on sled. Any suggestions?