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The BMW R90/6 was built from 1973 to 1976 with a 2-cylinder, 898cc, air cooled, 2 valves per cylinder, carbureted, 4-stroke boxer engine that made 67 HP. Top speed was 120 mph. Five speeds, shaft drive, wheelbase 57.7, seat height 32, 3.25 x 19 front wheel, 4 x 18 rear wheel, front disc brake, drum rear, 6.3 US gal. tank. 52 mpg. 474 lb. wet weight.