radiator

I am riding at KTM 520 and it continually overheats. Then the release valve shoots steam from the radiator. I'm in 20 degree weather clipping along in 3rd and 4th gear with my buddies, but they are not overheating. Any ideas or fixes? Thanks!

I hear alot about people putting in big rear U-coolers and removing the front cooler to clear a bigger paddle/increase snow evacuation in the front of the tunnel. I have heard this may reduce bulkhead strength (which does make sense), but my question is, what do you do with the coolant hoses...