Is this thread still active? I can't upload photos because I'm new to the forum, but I'm hoping to ID my Motobecane. Numbers at the base of the frame are 4181451, with 018 stamped just below that. Any help would be appreciated.
I think it is active, just not noisy
Perhaps you could upload links to Flickr album for example (Possibly? I've no idea if that's permissible).
Best way to figure out what you have is to take everything you know about the bicycle and compare it with the catalogues (for example:
Motobecane Catalogues). But also look for the French ones. What lugs were used? What tubing? Which head badge (square, round?) Any branding on dropouts? Disclaimer: I'm by no means a specialist or expert. I just love Motobecanes, great bicycles.