just what i have noticed with stm rage 6 and stm secondary - gen 2... seat of the pants is awesome, holeshot feels awesome, you crest a small bump and it wheelies instead of just lunging over. Without doing actual comparison with another machine it FEELS way faster, SEAT OF THE PANTS... now i have two of these machines and before the clutches were installed they were a dead even run in a drag race, AFTER the clutches were installed the STM only gained about 2 machine lengths over the stock machine in a drag race... now out riding, we have some pretty big sand hills to climb, climb straight up until you cannot go any farther and back up-- this is where i was hoping to see the biggest improvement with the STM, and it is actually where i noticed NO improvement over stock, stock machine would climb just as high as the STM machine-- disappointed... now after roughly 300 miles on the STM clutches, the oneway bearing on the primary failed... so while removing the primary clutch bolt (that was provided by STM) it took very little torque and broke off!!! threads still in the crankshaft !!! Yes this broke REMOVING the bolt! re-installing stock clutches and sent these back to STM...
Not to Hijack the thread but the point is make sure it is quicker than a stock one before you race that rzr 1000, sometimes if it FEELS quicker it is not always ACTUALLY quicker... lol and yes the STM's we had were tuned properly, i have a lot of background with clutches from snowmobiles to rzr's, when we first got the STM they felt good but were not ANY quicker in a drag race, after a full day of tuning best we saw again was roughly 2 lengths.
Also, STM told me clutches were same diameter and WOULD NOT LOSE ANY top end speed, FALSE!! STM primary is 1/4" smaller in diameter than the oem factory primary, the machine did 76mph on digital speedo stock and with STM it would only do 73....