Rekluse Racing RadiusX Auto Clutch. RadiusX is a high performance centrifugal auto clutch combining our TorqDrive and EXP technologies. TorqDrive provides more clutch disks in less space, allowing for maximum performance within your bikes existing clutch footprint.
For anyone with wrist problems or arthritis in the hands, this clutch is awesome. I find downshifting without manually clutching is a breeze and up-shifting through the lower gears is also easy. For the upper gears, only a slight pull on the clutch lever allows easy engagement. At stoplights, it's a pleasure to be idling in first gear, ready to go with just the twist of the wrist. And the fact that it's impossible to stall, even though that's not usually an issue for experienced riders, is always nice (nothing more embarrassing than the rare stall in busy traffic). I first installed one of these in my wife's bike, and after driving it, found I just had to have one in mine. I'll never have another bike without this clutch.