BSA Owners' Club Forum

The BSA Workshop => Twins => Topic started by: HULLAND on 05 November, 2017, 16:46:57

Title: auto advance and retard
Post by: HULLAND on 05 November, 2017, 16:46:57
Hi Guys,
Recently finished building a 1953 Gold flash,having prob's with the auto/advance, when tightened bob weights go tight, new springs fitted
but to no avail.
Can anyone throw out some light, excuse the pun.
Brin.
Title: Re: auto advance and retard
Post by: JulianS on 05 November, 2017, 22:30:56
When the sleeve nut is done up and unit attached to magneto it does not quickly return to retard if the unit is opened by hand, due to the weight of armature, magnetism, friction in the bearings and brushes and the contact breaker heal when it is on the cam.

Kick the engine over and it should easily return.
Title: Re: auto advance and retard
Post by: HULLAND on 06 November, 2017, 17:56:23
Thanks for that JulianS,
I'll check it out.
Regards Brian.