looking for help! After installing 2 new radiators & filling them with engine ice coolant, I find that the bike now won't run properly. It keeps cutting out or I hear that pffft sound out the back of the exhaust. I believe there may be some kind of air lock in there. My mechanic says to run the bike & then lean it over at 30 deg & open the radiator cap, which should release the air. I tried that, but not only did it squirt hot coolant, but it's hasn't solved the problem. Any ideas??