If you're worried about temps when cruising town, which is what most people complain about the second fan or even just a manual switch on the original fan will help. But don't waste your time and money on aftermarket hoses, WaterWetter, and all the expensive coolants that come out because none of them do anything in that situation.
I use distilled water and WaterWetter in my trackbikes because it's required. It doesn't make it run any cooler, especially 10-20 degrees. I tried EngineIce a few years ago on the street and it did nothing but make my wallet $40 lighter. I've never used the hoses because the plain old black ones that come attached are perfectly fine with me so I can't say for a fact that they don't do anything but like ted mentioned, unless they are made by magical elves they are just hoses. Brightly colored hoses, but still just hoses.
Sportbike engines make a ton of power for their size and that results in a lot of heat. On top of that sportbike cooling systems are designed to be barely adequate and most effective when the bike is in motion. That means there is pretty much nothing you can do to lower the temps that your bike runs.