Motorcycle clutch assembly compatible with models including MT03 MT-03 2006-2009, XT660R 2004-2011/2014, XT660X 2004-2011/2014, XT660Z Tenere 2008-2013/2015, YFM700R 700 2006-2020, YFM660R 660R 2004-2005, YFM660R 660R Limited Edition 2004-2005, and YFM660R 660R Special Edition 2005.Also fits part numbers 5VK-15590-00 and 5LP-15590-10. This clutch assembly is constructed from aluminum and functions as a one-way starter clutch for motorcycle engines.It transfers power from the starter motor to the crankshaft during engine startup, enabling the piston to operate.The design helps prevent damage to the motor by managing rotational forces during engagement.Proper function of the clutch supports starting and contributes to overall engine performance. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.