I've got a 07/yzf450. It's only been ridden about five times . Every since new soon as it's started and has ran for 45seconds ,water starts coming out of the radiator overflow tube . Everyone that i talk to ,shop mech. ,friends that are use to the fourstrokes say it's running to lean . So i being new at the fourstroke thing fattened it up . First the fuel mixture screw had to be changed to so that i could make the proper adjustments while the bike was running like the manual instructed with the idle scew . Still water out the tube. So i changed the pilot jet ,went bigger, still water out the tube . So i raised the neddle one notch , still water out the tube . So went bigger on the main jet , still water out the tube . The bike needed the carb mods i guess because it runs better than before ,but i still have water . What if anything should i try next? Thanks in advance !