Hi guy's need your help.
I'm converting my RM19 alternator to 12v. I know you connect the green/yellow and green/black wires but what then. Currently my G/Y runs to the ignition switch and the G/B to the rectifier. So my question is do I run them to the ignition switch or the rectifier. I'm also replacing the original light switch with a simple off/on/on toggle switch so can I do away with the wires that feed back to the rectifier from the original switch
Both alternator outputs need…
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As it happens
As it happens ther are no more Zener diodes, No longer made (since 1980s) either use an old one that is in good condition (I can check). Or you will need a regulator/rectifier (which I sell).
The basic facts for this are on my web site, aoservices.co.uk
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Do I only need a regulator…
Do I only need a regulator because I'm converting to 12v the bike is currently 6v and only has a rectifier and no regulator is shown in the wiring diagram
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Regulator
Yes, because the 6v system switches the alternator coils in and out, depending on lighting selected, to control battery charging. With 12v full power is supplied all the time and as said above the output is fed straight to the rectifier and controlled by a Zener diode or a regulator/rectifier.
But as Al said the Zeners are like hen's teeth so unless you have a good one you will have to ditch the rectifier and fit a regulator/rectifier - as said above.
All required details are on Al's web site
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Thank you for the help guys…
Thank you for the help guys. I've got a regulator/rectifier I took off a bike some time ago. My next question is I know you join the G/Y and G/B together and connect them to the yellow wires but what happens to the W/G that used to run to the rectifier do I just forget about that and blank it off?
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Alternator connections
The G/Y and G/B get joined together onto one Yellow from the reg (either one) and the W/G goes to the other reg Yellow. That is how the AC from the alternator gets rectified to DC.
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Both alternator outputs need to go to the rectifier such that the whole output is rectified to feed the battery. The extra coils which were only connected when the lighting switch was switched ON will now be connected permanently to the rectifier. Of course this will need regulating by a zenner diode or something like a Boyer Power box to stop the battery boiling over. Change the lighting switch to a Lucas 88SA or similar but you will need to make a fill-it because the opening in the headlamp is bigger for the 6V Dominator switches. Good luck, Howard