BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: dougc on 21 Feb, 2021, 09:01

Title: C15 alternator
Post by: dougc on 21 Feb, 2021, 09:01
I have an alternator with only two wires but the wiring diagram shows three,any ideas help please.
Title: Re: C15 alternator
Post by: JulianS on 21 Feb, 2021, 11:01
2 wire stator is for a 12 volt system and would have the windings encapsulated in resin and uses a 74 mm diameter flat sided rotor. Output cables would be green/yellow and White/green in colour.
Title: Re: C15 alternator
Post by: dougc on 21 Feb, 2021, 13:22
Thanks for your reply, I think my stator may have been modified, the windings are open and the rotor is only 70 mm diameter. I wonder if anyone knows how to return it to three wires. It came to me as a trials bike, so it was running without a battery as a crude energy transfer system. I'm equipping it with full electrics, but got a bit stuck with it when I found I needed three wires from the alternator and discovered there were only two.