Insane Triple Engine Yamaha R5 (based) 2-stroke Drag Racer!!! on Sunday, April 25, 2010 Labels: dragbike, radical, unusual, Yamaha From Suzukijoe's visit to Willow Springs. Insane Triple Engine Yamaha R5 (based) 2-stroke Drag Racer!!! 4.5 5 case Sunday, April 25, 2010 From Suzukijoe's visit to Willow Springs.