Two wiring questions

[old_chopper]

I'm building a simplified wiring harness to get my 79 running and I have two questions. I am using the "1978-1979 Yamaha XS1100 starting, charging, and ignition diagram" I got off this site.

#1-Wires leaving the pick up coils change color at the plug in but two of mine are reversed from the diagram.
Diagram Bike
black-yellow/green black-yellow/green
orange-yellow/red orange-white/red
blue-white/green blue-white/green
gray-white/red gray-yellow/red
light green-light green light green-light green

#2-out of the stator I have a yellow wire that used to tie in I believe to the light circuit. On my suzuki I hooked this leg from the stator to the regulator. Any such fixes on these bikes?

Thanks in advance for your help!

[bikerphil]

Are you using this diagram?

[old_chopper]

Yes I am. In the lower right corner the wires coming out of the pick up coils change colors at the plug. The diagram shows orange turns to yellow/red but mine actually has orange turn to white/red, then diagram shows gray turns to white/red but mine gray turns to yellow/red. It's like these two wires are switched in the plug going to the ignition box. I was hoping somebody could look at their bike and verify that the diagram is correct.

[natemoen]

It's possible the wires have been out of the plugs before and just didn't get put back in right. As long as the right signal gets to the right spot on the tci I guess it doesn't matter what color the wire is.

Does the bike run right?

[old_chopper]

I haven't got that far yet. Carb parts will be here Monday. The wiring harness was in bad shape so I stripped it out and retained all the factory plugs, then spliced new wire to reach between components. The plug in question doesn't have the scratches that would normally be associated with removing the leads from the plug but it is possible. That's why I would really appreciate somebody comparing their running bikes plug to the diagram before I swap the leads in the plug.
I did figure out the yellow wire leaving the alternator, it went to the headlight relay to turn the head light on when the bike starts.
Thanks again!

[DGXSER]

You could check in the manual for what wires to check for voltage readings for each pick up coil. that will tell you which wires should be form the same pick up coil. Then you can check to see that this is correct. After all, color is only skin deep, or wire sheething anyway. As your trying to get down to, its what those wires are hooked to that counts.

[bikerphil]

This might help you with the proper wire location....

[DGXSER]

Bikerphil helped me fill in a blank or two. I think this correlation should give you the answers.

[old_chopper]

Good news, the bike is making spark. Now I am not sure if it's at the correct time but it is a solid spark. The oil filter bolt is rounded completely off so that's the next item to fix. Then the new oil and flter go in, carb parts will be here Monday, maybe hear it run mid next week! It's a long ways from a ride but it will be cool to hear it run. The tag is 1996 so I guess it's been 14 years.

[DGXSER]

You sound like an old hand at working on these machines, so this may not surprise you as it did me.

You may want to run a compression check and see what you get (forgive me if you already did, short-timers is me.) I have been told and am in the process of seeing if it is true, that low compression can work itself out by running the engine and letting the rings re-seat.

[bikerphil]

IIRC, when the reluctor is pointing towards the top P/U coil, it should be firing the 1+4 coil (#1 compression stroke TDC).

[old_chopper]

Did a compression check already before working on electrics. #1 was about 150, other three were around 100 or so. Not too worried about the difference yet, just wanted to be sure there wasn't a 0 in there. I'm pretty sure they will even out after some good hard running.

[BMB6490]

I'm also trying to build a simplified wirring harness. Will my bike get spark if I hook up this diagram directly?