BMW introduced a single cylinder 250cc machine, the R24 in 1948 and followed it with an over head valve, horizontally opposed twin displacing 500cc in 1950, typed the R51. The new machine featured plunger rear suspension and telescopic front forks and was followed in 1951 by a visually identical model displacing 594cc typed the R67. The enlarged model produced a claimed 26bhp at 5,500 rpm compared to the smaller machines 24bhp at 5,800 rpm resulting in an increased top speed from 87 mph to 93mph and would remain in production until 1956, undergoing two revisions during that time.
Technical SpecificationsBMW R67 (1951)
| Engine Engine type Bore x Stroke Displacement Valves Compression ratio Max Power Max Torque Fuel system Transmission Final drive Clutch Ignition type Starting system Lubrication Gear ratios | 4-stroke, 2 cylinder flat twin, air cooled, OHV 72 x 73 mm 594cc 2 valves per cylinder 5.6:1 26 hp @ 5,500 rpm - 2 carburettors 4-speed Shaft Dry single plate Magneto ignition - Wet sump Forced feed lubrication |
| Dimensions Frame type Overall length Overall width Overall height Wheelbase Seat height Ground clearance Weight Fuel capacity Suspension (front) Suspension (rear) Tyre (front) Tyre (rear) Brake (front) Brake (rear) | Double loop tubular frame 2130 mm 790 mm 985 mm 1400 mm 820 mm 165 mm 230 kg 17 litres Telescopic fork with hydraulic shock absorber Telescopic suspension 3.5 S 19 3.5 S 19 Drum brake, 200 mm Drum brake, 200 mm |
