Like honey badger said, reduces the amount of twist. Doesnt go by 1/4 measurements. Comes with 5 different reels that can be swapped out within a couple mins. 3 different size ones measured in various degrees and 2 progressive ones. Start out nice and easy but as you turn the throttle more, becomes more aggressive. The only thing i hate about it is the housing. I have one on my zx10r and zx6r and both housings hand a 90* where the cable goes into. Making it a bitch to route the cables to the originial location. The oem housing is more like a 70-80* bend. The brake reservior gets in the way.