12-05-14, 10:36 PM
Just to add my bit to the good info already given. The nut you need when replacing the sprocket is part number 90891-10124 and comes as a kit that includes the lock-washer. The nut is 12mm thick. The one in both sets of photo's (MF92 and fazersharps) is the old 9mm thick nut. Do not let a Yamaha dealer sell you part number 90215-21290 just because it is still listed!
Plenty on this forum about the sprocket nut if you like lots of late night reading.
Plenty on this forum about the sprocket nut if you like lots of late night reading.