I tweaked my left radiator the other day (I know, I'm getting radiator guards right away). I took it off and had it repaired, and I'm ready to put it back on and top it off. I didn't drain it completely. The bike has less than 300 miles on it, so the coolant should be fine, other than what came out when I removed the messed up radiator. A friend of mine says that his KTM has some sort of "bleeder valve" or some such thing to make sure there's no air in the line. I don't see anything like that in my manual. So . . . Can I just put on the repaired radiator and top it off without draining the whole thing? It came off very clean, and I covered the hoses. If so, is there some sort of bleeder valve like what my friend is talking about? The way he describes it, if there is air in there, no coolant will reach the motor. Is there anything else I may be missing, or any trick to this. It seems simple enough. Thanks for your help.