Hello. My brother has a 78 Motobecane, which is kind of a strange moped, the engine moves as the rpm's increase!! Anyways, does anybody know what the proper size belt for this ped is? He just got it back from a mechanic, and the belt he put on is too small; when you hit 20mph, the clutch starts grinding on the larger pulley just behind it. Also, the belt is so tight you cannot freely roll the bike around, the rear tire just drags. So if anybody knows what size belt we need, it will be greatly appreciated.
Oh yeah, it wont idle either. I tried adjusting the idle screw, but to no avail.
Anybody know where we might locate a manual for this french moped?