Re: Gas tank
"By the way, throw out your chinese petcock immediately. It's pure junk because not only is it prone to leaking, but it actually restricts the flow of the fuel! Open it up and you'll see what I mean."
I wouldn't throw it away if it was doing what it is supposed to... shutting off the gas flow. A fiber washer (usually colored red) is supposed to fit between the petcock and tank... is it there? I never had trouble with the carb not getting enough gas. Even if it is restricted, so long as it is getting enough, a bigger line doesn't change anything as the carb can only use so much gas. My opinion anyway.
Someday when I grow up I will probably lose interest in toys with wheels, but until then...