Some of the most famous engines in motorcycle history never stayed in motorcycles. From Triumph twins powering land speed streamliners to JAP engines showing up in speedway bikes, midget racers, and even early aircraft, these engines built more than just bikes. 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 #japengine #vincentmotorcycles #nortonmanx #triumphmotorcycles #lotuscars #enginecrossover #onelungracing