The Yamaha MIDDLE DRIVE GEAR has twenty-seven products enlisted in the schematic.
Parts such as the Middle Drive Gear: Housing Comp., Washer, Lock (11h), O-ring (2h7), Bolt, Flange(3vp) are included in the Xj900s 2002 4kmd Belgium 1a4km-300e1 Middle Drive Gear parts fiche.
With four applications this Bolt, Flange(3vp) is the most specified part.