| Diagram | Fig. 10 — TIMING COVER AND CONTACT BREAKER · ref 18 |
| Subsystem | engine bottom |
| Listed in parts books | 1976–1978 |
AUTO ADVANCE UNIT
An automatic ignition advance unit fitted behind the timing cover, working with the contact breaker to adjust spark timing as engine speed changes.
The 99-1263 is an automatic advance unit, the mechanism that lives behind the timing cover and works with the contact breaker to adjust ignition timing as engine speed changes. It's a mechanical device, using weights and springs to advance the spark as revs climb, so the engine gets the right timing whether it's idling or running hard.
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Our catalog record places this in the timing cover and contact breaker area of the engine, appearing in listings from 1976 to 1978. The catalog entry is brief, so if you're matching this against what's currently on your bike, check the physical unit and the points setup before you order.
If you're unsure whether this is the right auto advance for your setup, give the shop a call and we'll help confirm before you commit to the part.
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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