I would do full exhaust not just slip ons it really made a difference with my 2000

 

The only 09 RK's that had a cat are those sold in California.

I have the same bike as you OP and my bike also runs hot. I'm in Maine though so weather-wise it isn't as noticeable other than those hot days.

 

My '09 RKC is 103ci Stage II with Rinehart slip-ons and ACR's It's been dyno tuned twice. Has well over 65.000 miles on it. Runs great. But it does get hot in stop and start. I installed mid frame air deflectors and that helped a lot. HD's touring bikes have a heat problem. That's no secret. The problem can be reduced somewhat by richening the fuel on the low end. But not a whole lot.

 

 

 

 

In order for these bikes to pass EPA emissions testing the AFR (air to fuel ratio) at all speeds had to be increased. In other words run lean. Any engine that runs lean will run at a higher temperature because the fuel burns much faster in the presence of so much oxygen. Plus any carbon monoxide left over will ignite in the exhaust and generate even more heat. Add in higher engine displacements. Free flowing air intakes. Add in the weight of a touring bike and heat is the result. Some improvements can be made by using tuning software to richen up the AFR. But there's only so much that can be done using just ambient air to cool things down. Thus the intro to liquid cooling, fans and more valves.