Looks to be a 1974 Masport President, the motor isn't original ,a lot of these Masports bases lasted longer than 2 motors so people kept replacing engines when the old one was worn out.
I like this model better than the later 1978 model as the later model has a heavier (bigger) rear discharge cover that vibrates ,rattles and thumps more than the earlier model when you use them without a catcher.
Some of these models the handle bars flop around on the base but you can change them to the better handle bars if you have spares.
