Ive put in fresh fuel, cleared the lines, connected all the tubes properly, cleaned out and rebuilt the carb.. The bike will fire up and run with starter fluid sprayed in there, and would do so continuously if I continued spraying the fluid. But once the fluid stops coming, the bike fizzles out and dies. Any suggestions? I'm so ready to ride, but I'm stuck here. Is it possible having the airbox off would be keeping the engine from running?