So I have a 2010 GSX 600 h.o. with about 7k miles. Ridden well but not abused. For the last two seasons the belt has been vibrating heavily when at a steady cruze. 25- 35- 55- 70 mph doesn't matter. If at a steady throttle it will vibrate. I rode the sled with the clutches/belt exposed and watched the top of the belt vibrate up and down about a 1/2" between the clutches. It feels like the clutches are not keeping the right tension on the belt. Yes I have the right belt and I have adjusted the secondary so the belts sits right. My thoughts are a worn out primary spring or a worn out bushing or something. I am mechanically inclined and nothing looks out of place. Any help or a referral to a sled shop that could help me get back to original would help. Adding a $400 clutch kit won't help me. Thanks! Andy