I've been working on a 1977 Motobecane 50L. It has no air-box. And i have looked High and Low to find one, No luck. If ANYONE knows where i can get one please speak up. And i do know this part can be expensive since it is hard to find. Im pretty certain I need the Square air-box. The carb intake faces the right hand pedal. PLEASE if anyone knows where i can get this don't hesitate to let me know. Thanks in advance.