Polini Clutch Bell for Cagiva, Derbi Scooters COMPATIBILITY: Cagiva – Progress 50 2T Derbi – Aceno 50 2T, Atlantis 50 2T, Bullet 50 2T, City 50 2T, Two Chic 50 2T, GP1 50 2T ’01-03, Paddock ST 50 2T, Predator 50 2T With the POLINI race clutch you get fast starts off the line, plus more torque and speed from wider clutch surface pads that make gripping the inside of the clutch bell much better than stock. With a clutch and kevlar belt upgrades you will get much better performance for riding up hills and distances.