Complete clutch kit POLINI 230.0503 spring WAVE EVOLUTION VESPA 50 125 NLR SPECIAL PK ET3 PRIMAVERA PK XL ETS APE 50 with 4 discs

Complete clutch kit POLINI 230.0503 WAVE EVOLUTION spring VESPA 50 125 NLR SPECIAL PK ET3 PRIMAVERA PK XL ETS APE 50 with 4 discs POLINI CLUTCH KIT with WAVE SPRING for VESPA 50/125 Small frame Improves the range of clutches in the Polini catalog for Vespa 50, Special , 125 ET3, Primavera PK 50/125 and Small frame. Specifically, there are two frictions: ? 4 disc clutch with wave spring FOR RACE? 4-disc clutch with EVOLUTION wave spring. Both models are characterized by the new wave spring. The wave spring is a newly developed spiral produced with high precision manufacturing techniques. This spring, thanks to its honeycomb structure, guarantees excellent flatness on the thrust faces of the clutch and tolerates high loads of up to 200 kg. As standard, the Polini wave spring is calibrated to have a load of 80 kg, which can be modified thanks to the setting thicknesses available inside the package, which allow you to vary the load up to 200 kg of thrust. The spring is perfectly housed in the clutch hub provided with a special centering seat. The clutch hub and disc pressure plates are made of nitrided steel machined from solid. The clutch discs have been perfected with a material that increases their friction coefficient to improve their grip under stress. The FOR RACE clutch is made up of 4 steel discs covered with cork friction material (1.9 mm thick) and 3 steel discs (1 mm thick) and assembly is recommended for original or tuned engines up to 15 HP. The EVOLUTION clutch is made up of 4 steel discs coated with high-performance sintered friction material (1.9 mm thick) and three steel discs (1 mm thick) and assembly is recommended for engines prepared above 15 HP. POLINI CLUTCH KIT with WAVE SPRING: Code: 230.0502 For Race Code: 230.0503 Evolution 100% Made in Italy