classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: adyone on October 09, 2007, 03:35:42 AM

Title: ELECTRICAL
Post by: adyone on October 09, 2007, 03:35:42 AM

CAN ANY ONE HELP ME WITH THE ELECTRICS ON MY BSA 31 A DRAWING WILL DO SHOWING THE IGNITION SYSTEM

Title: Re: ELECTRICAL
Post by: L.A.B. on October 09, 2007, 04:38:24 AM

As your B31 is a 1946 model I would expect it to have a magdyno (magneto and dynamo in one unit)?

The magneto part of the magdyno supplies the ignition sparks, and works independently of, and is not connected to the electrical system (but the dynamo part should be).

Title: Re: ELECTRICAL
Post by: adyone on October 12, 2007, 03:12:07 AM

Thank you that made it a bit cleare but a drawing would help alot as most of the wirers have been choped or the insulation has rotted away.

thanks

Title: Re: ELECTRICAL
Post by: L.A.B. on October 12, 2007, 05:47:41 AM

I suggest that you get a copy of the workshop manual, as that is likely to contain a wiring diagram (as well as other information you may find useful?).

From Bruce Main-Smith? http://www.brucemain-smith.com/

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"BSA
1946 To 1953 WORKSHOP MANUAL. 348cc B31 and 499cc B33 models only.
( This item covers 5 or more years. )  
  Ref no:- 642 / AVERY/1124 PRICE £ 8.40"
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