Hi Guys and maybe Girl.

I have just had a break down of the regulator unit, and I have replaced it with a RR51 type. My PASO alternator has 3 wires, 2 yellow and 1 red. The regulator has only 2 yellow ( and of course 1 red(bat +) 1 Green (bat - ) and 1 white for the dashboard light indicator). According to the instruction, when the alternator has 3 wires as the PASO has, the 2 yellow wires go the 1 yellow wire on the regulator, and the red wire from the alternator, is to go to the other yellow on the regulator. BUT THIS DOES NOT WORK !. But if I connect the alternator as if it only to the regulator with only the yellow lines connected Yellow to yellow it seems to work. The voltage shows 13 volt fully loaded.? You know, I am satisfied that it works, but it just tiks me that it doesn’t work according to the plan. Does any one have a explanation.

Regards
Klaus

The answer to your question depends on when your bike was made, and where it was sold. My '90 sport that was sold in California has three wires coming out of the alternator, but the red wire is unused. I don't know why. I hooked it up according to the wiring diagram I had, but I got no voltage. I taped it off, and got a good 14v. Much later I got a hold of the wiring diagram for this specific bike, and it had only the yellow wires attached.

What did your old regulator have?