On this parts fiche the Bolt,flange 8x104 is the most specified component.
twenty-two components are listed in the schematic for this Cx650e 1983 (d) Germany Front Wheel - Disk .
A sample from the products for the Front Wheel - Disk include: Screw,oval,5x20, Nut,flange,8mm, Valve,rim(dunlop), Disk,fr.brake.
