A friend of mine and I were recently left with an old 1970 Motobecane Mobylette to get running. The bike has only 1100 miles on it so should be in good shape, but has not been on the road in at least two decades. As reasonably experienced "wrenches" we thought this would be a simple thing. After a partial teardown, we found a broken ring and a clogged up carb, but after ring replacement, a complete stripcleaning of the carb and some fiddling it sort of ran. We can start it by peddling on the centre stand, but it won't rev up nor hold an idle after that. Possibly part of our problem is we don't really understand how these machines are meant to be operated. We assume you simply start peddling these with the throttle on opposite lock then once up to speed, move the throttle and it starts. Is it then supposed to stay running? Or does the starting procedure need to take place again after each stop? Also does anyone have some initial set up specs for the carb...how much should the slider be open at idle...what about a starting mixture setting? Any other ideas gratefully accepted. Thanks in advance.