I suppose I did. I'm going to re route it the way you have it and see how that helps.
My goal was just to have the headlight work. It took a while to realize but the headlight power (brown/red) isn't tied into the headlight switch control (brown/white) on these harnesses as it should be. You manually have to do that yourself
You're right about that: I just this week fixed up a 2004 version of this same wiring harness in a K6, and it is also different: I was able to use the Brn/Red (with collar on the wires) circuit to/from the fuseholder by powering it with the Blk/Rd from his K3 headlight ON/OFF switch, which then used the middle fuse for his headlight, and then powered the Brn/Wht in the headlight bucket (for all the other lites) with that same circuit. This puts the taillight load onto the headlight fuse (it goes: Main fuse - ON/OFF hdlite switch - middle fuse - left hand switch - Keyswitch switch contacts - Taillight fuse - Taillight. Whew!) in a convoluted circuit, but it all plugs together with just one male-male jumper in the headlight bucket. Now the taillight is powered thru all 3 fuses!
For those uninitiated: the OEM circuit starts at the 15 amp Main fuse (Red from battery) to the Keyswitch, then becomes Black to the headlight bucket (and voltage regulator). from there, the right hand switch tkes a Black to power stuff, like the coils (Run/Off switch) and the START button, as well as the headlight.
Then:
On bikes with only the START button on the right switch (i.e., headlight goes off during Start), this wire comes back to the headlight bucket as Black/Red or Black/Yellow, depending on which factory made the 750.
On bikes with the OFF/ON switch on the right side, this Black becomes Black/Red (most of the time) on its way back to the headlight bucket.
For either of the above: when installing the PartsNmore harness, this returning wire should go to the middle fuse of your fuseblock. The PartsNmore wires are 2 female connectors on Brn/Red wires with a little white collar on them (the older harness has a red collar instead, so the collar might vary). The returning power from this fuse goes to the Hi/Lo switch on the left handlebar, most often a Brn/Red wire. This comes back from there as Blue and White to power the headlight Hi/Lo beams.
For bikes with the OFF/LO/HI switch, only a Blue and White come back from the right handlebar, and go to the headlight (very simple - K0-K2, CB500, CB550K0 bikes).