| Diagram | Fig. 5 — GEAR CLUSTER · ref 77 |
| Listed in parts books | 1968–1969 |
BSA Kickstart spindle complete
Complete kickstart spindle assembly for the gearbox kickstart mechanism.
57-2643 is a kickstart spindle, listed complete, meaning it comes as the assembled shaft rather than just the raw spindle. It shows up in the parts book under the gear cluster and footstart-and-footchange figures, so this is the shaft that the kickstart lever pivots on and that engages the gearbox internals when you swing the lever down to start the engine.
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Being a complete spindle assembly, it's meant to go in as a unit rather than requiring you to source and fit separate small parts to build one up. The catalog record ties it to the 1969 model year in our listings, but doesn't spell out which specific model beyond that.
If you're rebuilding the kickstart mechanism or chasing a worn pivot that won't return properly, this is the part to check against what's currently in the case. Call the shop if you want us to confirm fitment before you order.
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