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BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: Captain Mike on 18 Jan, 2021, 14:55

Title: Part number and other info for A 10 Auto advance
Post by: Captain Mike on 18 Jan, 2021, 14:55
Hi all

I have stripped the thread on the securing bolt that pulls the contact breaker off the tapered shaft in the magneto and consequently can not get the bolt far enough in to reach the the thread housing in the mag

I am looking for a replacement auto advance unit and new bolt, but am a little confused about part numbers and degrees of timing quoted, does anybody have definitive information on the part number for an auto advance unit for a 1957 A10

Thanks in anticipation

Mike 
Title: Re: Part number and other info for A 10 Auto advance
Post by: JulianS on 18 Jan, 2021, 15:09
Lucas part 47503.

This only fits A7 A10 and Ariel Huntmaster

44 teeth.

Below from Lucas catalogue.
Title: Re: Part number and other info for A 10 Auto advance
Post by: Captain Mike on 18 Jan, 2021, 15:13
Wow, thanks for the quick reply, much appreciated

Thanks
Julian
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