What else did you put in there? Just water? (If so, I hope it was only distilled water. Tap water or drinking water is a no-no.) Or a coolant/water mix? (Again, only distilled water.)
Generally speaking, the more water you have in the coolant mix, the cooler the engine will run. That's because water transfers heat easier than coolant. And if you add water wetter, it's supposed to lower your coolant temps a bit more.
Go to the Redline website to see some info on how it works.
That said, I'm a firm believer in using coolant as long as I'm not on the track. Coolant offers better lubrication of the water pump seals than water wetter and also has anti-corrosion stuff in it. If you don't ride or store the bike where it gets below freezing, I'd just run 1/3 coolant and 2/3 distilled water. And water wetter if you'd like.