nice original clutch bell for your derbi piston port or pyramid reed. i replaced the drawn cup bearing with a HF1616 one way bearing and the 6201 bearing with a nice polish NSK one. the 6201 is binding, so the center spacer needs to be shortened just a hair (like 0.15-0.25mm) to alleviate this. i'm lazy and dont care though, so you can get it for $40 shipped. comes with the bushing for the one way bearing and the variator nut.