Clutch Hub/Thrustwasher Compatibility Reference Photo id of early and late clutch hubs and their various types of thrustwashers
Assemble Clutch Hub, Rollers, and Clutch Center Step-by-Step instructions to assemble the clutch hub, rollers, duplex sprocket, and clutch center
Install Duplex & Engine sprockets & Primary Chain Step-by-Step instructions to install the duplex sprocket assembly, engine sprocket, and primary chain
The photos below illustrate the assembly of the clutch hub, rollers, duplex sprocket, and clutch center for a 1969 Triumph 650 motorcycle.
Actually, the clutch hub and thrust washers shown are the upgraded for 1970 parts. The 1970 parts are direct replacements for the earlier ones as long as the upgraded hub is paired with its upgraded thrust washer, whose ID is slightly different than that of the original ones. Click here for photo id of both early and late parts.
In any case, the assembly shown here is identical for either earlier or later parts.
Below: clutch hub 57-3929 (1970 upgrade) with 20 rollers held in place by dabs of grease
The clutch hub shown with a bronze thrust washer standing in for 57-3931. According to John Healy, bronze thrust washers like the one shown are third-party and were never made by Triumph. The bronze washers are beveled on one side and although some say the bevel should face the clutch basket, the most authoritative source I located says the bevel should face the hub (Mitch Klemph's Tips).
The same hub shown with thrust washer 57-3931 (1970 upgrade) made of copper. This washer is covered with copper on both sides. If only one side was copper-clad, it's copper side would be installed as shown here - copper side away from the hub and in the direction of the clutch plates.
The duplex sprocket has been lowered over the rollers and clutch hub.
The clutch center with its inside splines has been installed onto the clutch hub with its exterior splines.