| Also known as | GB22A |
| Diagram | Fig. 5 — GEAR CLUSTER · ref 102 |
| Listed in parts books | 1969–1971 |
CAMPLATE,B25/44/50,TR25W
Gearbox camplate for BSA B25/B44/B50 and Triumph TR25W singles, also known by the older GB22A number.
This is a gearbox camplate for the BSA B25, B44, and B50 singles, and for the Triumph TR25W. It's the star-shaped plate inside the gearbox that the selector mechanism rides against, translating the motion of the gear lever into the sideways movement that shifts the gearbox forks from one gear to the next.
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The part number 57-3850 also shows up under the older GB22A designation, which is worth knowing if you're working from an older parts book or matching up a part pulled off a bike. Since these singles shared a lot of gearbox internals across the BSA and Triumph range in this era, the same camplate covers more than one badge.
We don't have much more detail than this in our records on this one. If you're rebuilding a gearbox and want to confirm this is the right camplate for your specific box, call the shop and we'll sort out fitment before you order.
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