I have a 1977 motobecane. I bought a manual for it online,but it't incomplete. Does anyone know where I can get a copy of the whole thing? Also, I think that the guy who sold it to me told me the wrong information about the gas to oil ratio. Does anyone know this info? It moves slower than it should. I am going to clean it thoroughly and drain the old gasoline and oil out, but I need to know the proper amounts. Any help in this matter woudl be appreciated!!