| Diagram | GEAR CLUSTER — CAMSHAFT |
| Subsystem | gearbox |
| Listed in parts books | Not catalogued by year yet |
SPROCKET 19T BSA A65
19 tooth gearbox countershaft sprocket for BSA A50/A65 twins, part number 68-3078.
This is a 19 tooth gearbox sprocket for the BSA A50 and A65 twins, part number 68-3078, also cataloged as SPR-A6519T. It's the countershaft sprocket that lives on the end of the gearbox mainshaft and carries the final drive chain back to the rear wheel sprocket.
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This is a BSA part, not a Triumph part, despite how it landed in our records. If you're working on an A50 or A65 gearbox and need the drive-side sprocket replaced, this is the number to ask for.
We don't have a lot of extra history on this one in our files beyond the basic listing, so give us a call if you want to talk through fitment before you order.
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