I just picked up this 05 50 for my 7 year old son that had "issues" with staying running...i figured a quick clean of the carb and no problem, but the dam thing doesnt want to stay running unless it is absolutely cold...then after a few seconds it dies out...I cleaned out the tank, changed the fuel filter, and cleaned out the carb...i saw some thread about fuel air adjustments....any help would be greatly appreciated, as my son is DYING to ride this thing...Thanks, Ed.