Sigma Slipper clutch: Yamaha XT660X/R/Raptor (4 valve)

Sigma Performance slipper clutches are the most widely used aftermarket slipper clutches in racing - allowing finely tunable engine braking characteristics from your engine, for increased stability under braking, and protecting your engine from downshift lockup and over-rev

This listing, is a five ramp, wet type. Hard anodised in grey; Clutch centre only. Uses standard clutch plates and springs