magnetos ???

[michael snellin]

Hello , everyone, just wanted to know is there a difference between a manual/automatic mag, just that i was at a good jumble at the week end did not know what to do.????? urgh ! felt a bid of a fool really!! not having nothing, that came with the bike when i bought it.

[RichardL]

Manual mag has a plain drive gear in the timing box and a lever on the handle bars that you use to retard the timing duiring startup and advance it when driving. The automatic timing device is a version of the magneto drive gear that uses centrifugal force to advace the timing automatically when spinning fast. In this case, no lever on the bars.

Richard L.

[muskrat]

 To further Richard's post. On the other end a manual type has a fitting for a cable near/next to a pickup.
http://www.a7a10.net/forum/index.php?topic=1045.0
Cheers

[BSA_54A10]

The magneto is the same unit.
Manual advance had a different bolt on end.
Auto has a different bolt on drive gear.
And yes you can put both on a single maggy.
Bike beesa
Trevor

[A10Boy]

Michael
Generally speaking "Iron" engines ie Golden Flashes have the auto set up and the sporty jobs, with Alloy heads, Rockets etc use the manual effort.