I'm having a problem with my SFGP. On the tuned exhaust pipe there is a 90 degree brass fitting that connects via a hose to the fuel tank to keep the tank pressurized and the fuel flowing. That fitting has come off and (although it's threaded) either the threads have stripped out of the pipe or possibly a nut (if it ever had one) has fallen off inside the pipe, which I can't access. Any advice that would help me get it back on would be greatly appreciated. Thanx...