I need help really bad! My girlfriend's 1977 Motobecane Mobylette has a serious exhaust problem. The previous owner stripped the exhaust port (both nut and the threaded portion of the Cylinder) then proceeded to tap a tiny hole as a holder for a screw (I'm guessing to wedge it). after I removed the exhaust to clean it I made the shocking discovery-and now it's impossible to put it back together. The is a serious shortage of parts in Ontario (canada) so I'm stuck for a replacement. Anyone with crazy and creative ideas please post em' I need all the help I can get!!!!!