In 1975, Kenny Roberts said he wasn't paid enough to ride it. Then he won on it anyway. The Yamaha TZ750 flat tracker crammed a road-racing engine into a dirt track frame with no front brake — and after Roberts' legendary Indy Mile win, the AMA banned it for good. Footage credit for every clip is shown on-screen throughout this video. Subscribe for more machines the world tried to forget. #motorcyclehistory #racinghistory #motorsporthistory #onelungracing #motovlog #forgottenhistory #kennyroberts #yamahatz750 #flattrack #amagrandnational #bannedmotorcycles #dirttrackracing