78 Suzuki 750 quit charging

[aknoblich]

I recently converted my 1978 Suzuki GS 750 to electronic ignition. Was working fine. Then it quit charging. I ordered a regulator rectifier. The old one had one black wire-ground one solid red wire one solid yellow wire one white with a red stripe and one white with a blue stripe.the new one they sent me has the black and red wires and three yellow wires. So question is how do I hook this up? Is it that way cause the yellow wires don't matter how they are hooked up? Anyone have an answer?

[greg_in_london]

I'm not looking at a wiring diagram or a manual, so take this with a pinch of salts, but the conventional way to charge a bike is to have an AC generator with three output wires (and the coils wired in star/delta connection). That sounds like what the new regulator is designed for.

 

A lot of Suzukis had a very different system, either with two coils or with a 'one plus two' system. For normal running they would use the first coil to charge the battery and any ancillaries. For night time both/all the coils would be used and the lights will be on, soaking up the useful power.

 

Unless anyone knows better, I'd suggest that you check you definitely have the right reg/rec for your bike.

 

I never had the GS750, but I did have versions of the GS250T, GSX400 (twin), GS550, as well as GT380 and 550, plus a GR650, so I've seen some Suzuki variations.

[Flyinfool]

Based on the wiring diagram, there are 3 yellows because it don't matter. The red and the black do matter a lot.

 

Suzuki_GS750.pdf

Edited June 18, 2016 by Flyinfool