Reinforced Polini maxi speed clutch bell. The reinforced outer ring ensures a lack of distortion and thus better durability. Ideal for use in combination with the Polini clutch, but fine with the original clutch. Discoloured and misshapen clutch bells mean poor power delivery, drive and a lack of torque. The drive system then runs with ever more worn clutch plates and if you wait too long, you will have to replace the entire clutch. Replacing the clutch bell in this case is the only option.