Motorcycle Starter Clutch Assembly compatible with 950 Adventure (2003–2006), 950S Adventure S (2003–2006), 950 SuperMoto (2005–2008), 990 SuperDuke (2005–2008), 950 Super (2007–2009), 990 Adventure (2006–2013), 990S Adventure S (2006–2008), 990T Supermoto T (2010–2013), 990R Supermoto R (2010–2011), and part number 60039005100.This clutch assembly functions to engage the starter motor with the engine during cranking, allowing power transfer from the starter to the crankshaft while preventing reverse torque from damaging the starter.Constructed from aluminum.Fits as a direct replacement for the starter clutch assembly.