| Diagram | Fig. 8 — OUTER TIMING COVER, KICKSTART AND FOOTCHANGE · ref 7 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1972 |
BSA Auto-advance unit (Lucas 54419344)
Lucas-numbered auto-advance unit (54419344) for the timing/points assembly, found in the outer timing cover and kickstart figure.
This is the auto-advance unit that sits behind the outer timing cover, referenced in our catalog under the Lucas number 54419344. It's the mechanical assembly that adjusts ignition timing as engine speed rises and falls, working off the contact breaker/points setup rather than a separate electronic advance.
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The catalog shows it living in the timing cover, kickstart, and footchange figure, which places it at the front of the engine on the timing side, tucked in with the points and cam assembly. Our records tie it to appearances across catalog entries from 1969 through 1972, but we don't have a specific model or engine size pinned to it beyond that.
If you're chasing this to replace a worn or sticking advance mechanism, give us a call with your engine and frame numbers before ordering. Auto-advance units can look similar across different applications, so we want to make sure you get the right one.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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