I have a 2 stroke quadmaster 50,what oil should be used,there are 2 lines coming off fuel petcock one is the main to the carb,does the other one go to the cylinder by the intake and there is also a clear line on the top of the carb does the othr end connect to anything and does anyone know the specs on air and fuel screws.Been looking all over for this info and can not find it.Thanks.