Suzuki 50cc racer .The RK67 motor was a two-stroke, water-cooled parallel twin, and the Japanese factory managed to squeeze a remarkable 17.5hp out of it, with a redline of 17,300rpm. To keep the bike in its extremely narrow power band, Suzuki fitted the bike with a 14-speed gearbox.
The RK67 also sported an aluminum frame, and tipped the scales at a skinny 58kg (128lbs): in the hands of Suzuki’s three factory riders, top speed was a healthy 176kph (109mph).
