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BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: berniej on 04 Jul, 2019, 11:11

Title: B40 SS90 ignition advance
Post by: berniej on 04 Jul, 2019, 11:11
Just finished cleaning and rebuilding the distributor and, as per RR singles book, was checking for the advance stamping on the bobweight platform.

Mine shows 10 degrees although RR states "B44 and B50 12 degrees, all others 15 degrees except energy transfer models which are 5 degrees".

Is 10 degrees correct for the SS90 and what is the static timing setup please?

Thanks,
Bernie
Title: Re: B40 SS90 ignition advance
Post by: JulianS on 04 Jul, 2019, 12:36
The distributors changed advance range. The service sheet from January 1963 explains and also gives static timing.
Title: Re: B40 SS90 ignition advance
Post by: berniej on 04 Jul, 2019, 13:58
Brilliant! Thanks Julian.

Regards,
Bernie
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