Im actually about to build my first 50cc also, im going to use two fromeco 2600 mah batteries running into power regulators and then there gonna have each there own heavy duty switch harness, then there going to go into a battery redundacy unit that im going to buy from dons hobby shop. Then from there its going into the reciever. Im going to set up a manual choke on mine. I really dont know a whole lot about this stuff but, theses other guys can help a lil more. I think the way im going to set it up will be ok.