So I have an 01 cbr 600 f4i and I'm in MI right now and it runs fine and all but I'll be moving to AZ soon and want to know what is the best way to keep my bike/engine cooled down while riding out there. What part would work best?

 

If everything is functional on the bike, it should be fine.

If you just like modding/messing around, there are a few things you can do:

Fan - One mod makes the fan kick on when engine temp hits 200 rather than the stock 220ish. Another one allows you to control the fan through a toggle switch.

Engine - Switch out the antifreeze and water mix for Water Wetter and water or use pure Engine Ice.

Lot's of threads with lot's of opinions and differing results that you can check out before making a decision...

 

The F4i runs cooler then any other Honda sportbike. You don't need to do anything mods wise.