Yamaha also do a Sprocket nut and Washer Kit part number 90891-10124 (all in one packet) Torque setting for new nut is 90Nm
Might be loctited or rusted on, an air or electric impact wrench should shift it.
Last resort method, take off the chain guard/hugger, put a lump of wood in through the spokes on top of the swinging arm. Flatten off the tab washer, 1/2 inch drive T bar with socket and a scaffolding bar on the T bar will shift it :lol
Might be loctited or rusted on, an air or electric impact wrench should shift it.
Last resort method, take off the chain guard/hugger, put a lump of wood in through the spokes on top of the swinging arm. Flatten off the tab washer, 1/2 inch drive T bar with socket and a scaffolding bar on the T bar will shift it :lol