Yankee Reppuu-tai

He has been expelled from and transferred to more than twenty schools, has never lost a bare-knuckle fight, risked his life for the women he's loved, and is an amazing guy with a cocky face.... His name is Monnojou Monda! With the legendary hardcore biker gang Reppuu-tai, Monnojou goes on a rampage against the super-villainous biker gang Black Zeppelin. Astride his cherished DJ-R, he makes his appearance with a roar!

(Source: Kodansha, translated)