Hello guys, I'm new to this forum so forgive me if I make a few mistakes. I recently bought a used 2006 KX450F and have been having so issues with with. First when I got it home I started taking it apart to see what I had bought. I noticed the left side radiator was bent and had alumiweld on it covering a hole. I bought a new racing radiator so that problem was fixed. I then removed the carburator so I could install a new rebuild kit and the plunger for the Hot Start got stuck and the two fingers that hold the cable in broke off and I cant get the plunger out. I ordered a new plunger, cable and Pro Circuit male adaptor end. Here's the problem, When I reinstalled the carb the bike instantly got hot and coolant was coming out of the overflow. Also the bike was popping. Keep in miknd I havn't got the parts yet they had to order everything. Does this sound like the bike it running lean due to the hot start being stuck in the on position? I know the popping it a lean mixture issue. Would running lean cause the bike to over heat in about 1 minute? Thanks guys.