Author Topic: magnetos ???  (Read 875 times)

Offline michael snellin

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magnetos ???
« on: 08.05. 2013 17:01 »
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.

Online RichardL

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Re: magnetos ???
« Reply #1 on: 08.05. 2013 17:10 »
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.
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Online muskrat

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Re: magnetos ???
« Reply #2 on: 08.05. 2013 21:14 »
 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
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Offline BSA_54A10

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Re: magnetos ???
« Reply #3 on: 09.05. 2013 11:43 »
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
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Offline A10Boy

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Re: magnetos ???
« Reply #4 on: 16.05. 2013 14:55 »
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.

Regards

Andy

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