i'm running a turbo freeride and i have the tki, i beat the living snot out of it and it's still perfect. i did only get about 300 miles on it, but i wasn't nice to it and the drive belt looks fine. One thing I really liked is when i wanted to try different gear ratios all i had to do is change out the top gear, the bottom stays the same size and you just adjust the top size. The big bonus with that is Tom worked with me very well on the different gears, and changing it out was super easy (the turbo did make it a little harder being in the way but having the stock chain case would have been really time consuming).