Featured Items:


Final Belt Drive Primaries

Final Belt Drive Inner Primaries


The image above shows three different versions of the inner primaries for rear belt drives. They characterize the three main categories of rear belt drive inner primaries: Although the different categories of inner primaries listed above differ from each other, they can all be used in a chain drive to belt drive conversion, or as a replacement for each other, with only minor adaptations. The same goes for the outer primary covers. Here's a list of the part numbers of some of the inner and outer primaries of '80-'84 belt driven shovelheads:

Index Part number Used on Remarks
60315-83 Late 83 -- FXDG Front belt, rear belt, dry clutch, forward shift
60414-82 83 & Early 84 -- FLH-80 Front chain, rear belt, dry clutch, forward shift, 9 hole
60414-84 Late 84 -- FLH-80 Front chain, rear belt, wet clutch, forward shift, 9 hole
60444-82 82 -- Classic, Early 84 -- FXWG Front chain, rear belt, dry clutch, forward shift
60444-84 Late 84 -- FXWG Front chain, rear belt, wet clutch, forward shift
60502-80A 80 to 83 --FXB, FXSB Front belt, rear belt, dry clutch, mid-shift
60502-84 Early 84 -- FXSB Front chain, rear belt, dry clutch, mid shift
60504-84 Late 84 -- FXSB Front chain, rear belt, wet clutch, mid shift
60498-80 80 to 82 -- FXB Outer primary cover
60508-82A 83 -- FLH-80 Outer primary cover
60515-83 Late 83 to FXDG Outer primary cover (maroon)
60523-82 Early 82 -- Classic Outer primary cover
60525-82A Late 82 -- Classic, 83 to * -- FLH-80 Outer primary cover
60531-83B 83 to * -- FXSB; 84 FXWG Outer primary cover


Clutch shells:

Clutch shells


The clutch shells used on final belt drive models differ only slightly from their chain-drive counterparts in that the ring gear on the shell is mounted in a different position. HD also modified the riveting of the blocks inside the clutch shell (dry clutch), to be able to move the ring gear over, as can be seen in the image above. In the middle is a standard dry clutch shell for a front chain, final belt drive. On the left is a dry clutch shell for a front chain, rear belt drive. On the right is a dry clutch shell for a front belt, final belt drive.
(As a side note: HD never brought out a bike with final chain drive and a primary belt drive. However, HD did provide a conversion kit for this. It came with a clutch shell that had a belt pulley in stead of a chain sprocket. The starter ring gear was mounted flush with the clutch shell however (since it was intended for a rear chain drive). These clutch shells are often mistaken to be for a FX(S)B with both front and rear belt drives).

Chain drive clutch shells can be easily modified to accomodate a final belt drive starter set-up (see here). Here's a list of the part numbers of clutch shells for final belt drives:

Index Part number Description Remarks
37655-80A 80 to 83 --FXB, FXSB; late 83 FXDG Dry clutch, front belt, rear belt
37707-82 82 Classic, 83 & Early 84 -- FLH-80, Early 84 -- FXWG, FXSB Dry clutch, front chain, rear belt
37707-84 Late 84 to * -- FLH-80, FXWG, FXSB Wet clutch, front chain, rear belt