Simering crankshaft PTFE / FKM Polini for the following applications: Aprilia RS 50 (2006-> / DERBI D50B) / RS4 50 (DERBI D50B) / RX-SX 50 (2006-> / DERBI D50B) / Derbi GPR 50 Racing (2006-> / DERBI D50B) / Senda 50 DRD / SM (2006-> / DERBI D50B) / Gilera RCR 50, SMT (2006-> / DERBI D50B) / Valenti Racing RME, SM (DERBI D50B).
- Can be mounted on both the crankshaft and the primary drive of the CVT;
- Made from FKM (fluorocarbon rubber) for better resistance to high thermal demands;
- The sealing edge is made from PTFE (Polytetrafluoroethylene).
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