The paddock couldn’t explain his pace. So they tested the rider. He was clean. The advantage was a Belgian engineer’s idea: delete both rear shocks, run one long unit lying flat under the tank, and let the swingarm work it as a lever. Rear travel went from about four inches to over six — and twin-shock bikes were finished. #OneLungRacing #2Stroke #Monoshock #Yamaha #YZ250 #Motocross #MXHistory #VintageMX #TwinShock #Suspension #MotorcycleHistory #MotorcycleEngineering #Tilkens #1973 #ClassicMotocross #DirtBike #TwoStroke #MotoHistory #BikeLife #MotorcycleLovers #MXGP