John, then yes you will need to lean it out after you finish break-in. So if you feel you are finished with break-in then start to lean it out 1/8 of turn at a time both lsh and hsn you will find the official CEN tuning guide [link=http://www.cenracing.com/downloads/Engine%20Doc%20NX76.doc]Here.[/link]

Godd luck have fun!!