I have a 2000 cbr600f4. The bikes has a few wiring issues. I heard there are 2 main harnesses, the head harness and the main harness. I believe the main harness is the one that runs down the left side of the bike front the front of the bikes where all the lights, gauges, and switches are to the rear where the relays and tail lights connect. I think I am in need of a new main harness but I can't find the head harness for the bike.

 

I believe that there is only one Harness
https://www.lingshondaparts.com/part...ckref/F__2800/
as an example.
There is a small loom for the speedo, is that what you are thinking of?
https://www.lingshondaparts.com/part...ckref/F__0200/