motor starting clutch XV250 is a sprag type starting clutch,fitted for motor starters such as YAMAHA MATESTY-250,XV250 etc. motor starting clutch XV250 is a sprag type starting clutch,fitted for motor starter such as YAMAHA MATESTY-250,XV250 etc.Its clutch shaft outer dimension is 42.2mm, with outer race inner dimension is 58.9mm. motor starting clutch XV250