Saturday I traded my old rm 250 2 stroke off on a gently used 03 yz 450f. I am more than impressed. I had heard that these big bikes dont handle as well but mine handles as well as or better than the 250. Now I have never had a high performance 4 stroke like this and I have a couple of quick questions. First of all what octane gas would be best to run in it? I know you dont have to mix it but i just wanted to make sure. Second, the bike seems to get awful hot when running. I checked the coolent level and it was a little low but the bike is still awfully hot. My last question has to do with riding it. I ride it hard like a 2 stroke without all the revving but my dad says i'm riding it too hard. I appreciate any responses and all the help you loving fellow tt' ers can give me.