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Lucas magneto Auto Advance unit
#813397 06/21/20 12:43 pm
Joined: Jun 2020
Posts: 1
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Joined: Jun 2020
Posts: 1
I hope that someone here can help me with a problem with the magneto on my BSA A10 - 1953. I got at new fixing nut for the Auto Advance Unit, but I do not understand how to replace it. The old one will not come out, and disassembling the Auto Advance Unit means drilling out rivets, and I do not hope that will be necessary.
I am looking forward to hear your opinion.

Regards
Jens Ole Villesen
Denmark

The link should lead to pictures of the Auto Advance Unit - hope i works.

https://photos.app.goo.gl/BacPyXiHfqT5x9Ya8

Last edited by Jens Ole Villesen; 06/22/20 5:45 am.
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Re: Lucas magneto Auto Advance unit
Jens Ole Villesen #813414 06/21/20 3:19 pm
Joined: Aug 2001
Posts: 8,243
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I can’t see your picture, but my auto advance nut has coarse left-handed threads on its outside, that match a thread cut in the outer yoke of the auto-advance.

The threads get a bit chewed up by using the nut as an extractor, but you can usually get them to engage and screw the nut out, with a bit of pressure and turning the opposite way from the usual right-handed threads found on nuts and bolts.


Amateur Loctite enthusiast.
1 member likes this: Jens Ole Villesen

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