Hi. I'm,  rebuilding a '76 DT175 1G1. I have this wire, yellow with White tracer, comes off the voltage regulator. It's only short, 6" long, no bullet on the end,. I hope someone on here can tell me where it links the wiring loom? I have no loose wire anywhere near it and I'm at a complete halt with the rebuild. There is the usual joining block from the generator that plugs into it's matching block into the loom.

As you say, it is the voltage regulator wire and they usually have a male bullet connector on the end.

I have a feeling that those regulators were mounted in the airbox or battery box area, so maybe have a really good rummage in there. Does the main loom/harness look like it might have been re-taped up at some stage? If yes, then the wire that the regulator plugs into might have been taped over. 

Hi! Thanks for replying!   Yeah the volts/reg is placed in it's proper place on the front face of the air box. Looks like as you say, it's possible the end is under some tape. Looks like a little knife job tomorrow ? 

Is there a stray yellow within reach as likely came from there being the lights & highest output from the mag--.

I am not an expert, but I would not hook voltage regulator to mag output, but rather the blue wire that feeds H and L beams.  This way you don't blow your headlight or the gauge bulbs, but the regulator isn't taking full output of mag all of the time.  Just an opinion

Yeah true 'that' & i used to hook it to the blue. I wonder being yellow with white stripe he says, if there's a same color close by with the sripe & somehow it does a dodgy move where its ony in action after the switch so its not getting roasted without light n stuff in use--i dunno--need to find a good color diagram.

On the 76, the voltage regulator will connect to a yellow/white that goes the lighting switch. 

Regulator is out of the circuit until lights are "on"...

End result is same as hooking to blue but Yamaha designed the light switch to handle the task.