BMW R63 (1928 to 1929)

The BMW R63 series began in 1928, with a 735 cc flat twin M60 boxer engine, exposed driveshaft, and three-speed gearbox. The chassis had a rigid tubular-frame with 'sprung-seat' rear suspension, and six laminae plate-spring (trailing link) front suspension.

The R63's two-cylinder four-stroke 'boxer' engine produced 24 hp at 4,000 rpm, generating a top speed of 74 mph (120 km/h). Only 794 units were produced in the R68's 2 year production cycle.