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Thunder Shift Kit - Patented

Thunder Shift Kit - Patented


THANKSGIVING SALE!!! SAVE an additional 10% from the price shown on this item!!!
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Discount Valid through 11/27/17


  • LOW COST ADJUSTABLE CLUTCH WEIGHTS
  • Patented weight distribution method takes the guesswork out of clutching
  • Designed for lower horse powered sleds which need lighter weight
  • Fully adjustable in low, mid and top end with resolution as fine as 0.4 grams
  • Bushed weight sets are gram matched with base weight approximately 40 grams
  • ISR stock legal for Arctic cat, Polaris and Yamaha
  • Complete with tuning components and easy to understand tuning manual