I have a wire diagram and a book and it looks that the wire colors are the same mostly.
Which wire diagram are you using? From the Honda shop manual? The supplements show the specifics for all the wire harnesses.
Why wouldn't a 77 harness work if I used 77 components?
Of course, the more 77 components you have, the more a 77 harness will connect without much issue.
I haven't done it. But I think with the 77 bar controls, it might plug right up.
I know the 77 has block connectors. They are on my K3. And I can see them depicted on the wire diagram. The diagrams don't show the wire lengths and reach of the wires.
The 77 looks to use bullet connectors as well.
It uses bullet connectors in lots of places. But, the bar controls are block connectors. Of course, you CAN cut them off and crimp on bullets from vintageconnections.com
So what about a 75 harness?? I also plan to get new switches for the bars so I could go with 550f switches or maybe 77 switches etc.
As I mentioned, the 75 still uses the Starting Safety module. Several more wires for that. What will you do with those?
The F harnesses uses a junction box to collect various connectors located under the tank on the left side, rather than all inside the headlight bucket. This makes the wire length of whatever plugs into it there different than the K models.
Anything can be made to work. Just takes time and effort. But, if you are trading money for time savings, you may not get what you want.
I'll warn you that if you make a bastard wire harness that doesn't match any of Honda's diagrams, neither you or anyone else on this forum will have an easy time of locating faults a year from now.
I must say, with your description of your existing harness, I don't know why you need a total replacement. Were it me, I take each connector apart, clean them, coat them in dielectric grease, and reassemble. I mean you are taking stuff apart anyway...
Cheers,
