One has two crankshafts. One has eight cylinders inside 500 cc. One is mounted inside the front wheel. A tandem twin that won world titles, a car V8 in a bike frame, a square four that cooked its own rear cylinders for thirty years, a 500cc V8 that revved past 12,000 — and a 1921 German radial that had to be switched off at every junction. #OneLungRacing #2Stroke #Megola #MotoGuzzi #ArielSquareFour #BossHoss #KawasakiKR250 #WeirdBikes #EngineeringMarvel #MotorcycleHistory #VintageMotorcycle #RadialEngine #V8 #ClassicMotorcycle #MotorcycleEngine #RareBikes #MotoHistory #BikeLife #MotorcycleLovers #TwoWheels #MechanicalArt