Let’s replace the main harness.
Once you remove the harness, it looks really clean and sharp. The GSXR1100 looks especially sleek around the M/N generation.
The condition was so-so.
A brand new harness is so soft you can’t help but be impressed. It feels like replacing your blood vessels, and you convince yourself it’s going to make a real difference!
You might think the main harness runs from head to tail, but most bikes have a spot where all the connectors bunch up. Starting there and routing from that point might actually be faster.
After that, mark the thick branches so you don’t forget them. I don’t think the factory layout is the be-all and end-all. Some models are genuinely tight. It might be safer to avoid putting stress on the harness—don’t kink it or pull it too hard.
This starter relay cover has been around since the early models. It’s a real pain to fit, so I just cut it out completely and secure everything with cable ties instead.
Making it easier to disassemble in the future is also a good idea.
I wasn’t sure if it was okay to weld to the case, so I secured it with cable ties instead.
I installed a relay here for optional power. The fuse is a waterproof low-profile mini fuse rated at 10A. You can bump it up to 15A if needed.
The ground wire gets relocated from back to front.
• Easier to clean and maintain
• Easier to align during installation
That’s why. There’s not much benefit to tucking it away where your hand can’t reach.
The light won’t come on, so something’s wrong. That’s when I realized something was slightly different—my own foolishness…
My bad.
After checking, it turns out to be a USA or Canada spec with daytime running lights.
Suzuki rarely changes the harness…
So what’s different?
• The power routing from the fuse to the light, meter, position, and tail lights is different.
Turning it on and off is simple enough, but I want to keep the harness as unmodified as possible and have the position, meter, and tail lights work in sync.
After a day of troubleshooting, I finally got it sorted. Now it’s just a test ride and we’re done.
