BMW R26

Start of Production 1956

End of Production 1960

Numbers Produced 30,236

Engine

Internal Designation 226/1

Motor Type Four-stroke single cylinder vertical

Bore x Strok 68 x 68 mm (2.67 x 2.67 in)

Displacement 247 cc

Max Power 15 hp at 6,400 rpm

Compression Ratio 7.5 : 1

Valves OHV

Carburation System 1 x Bing carburettor type 1/26/46

Engine Lubricating System Forced feed lubrication

Oil Pump Gear pump

Power Transmission

Clutch Single plate, dry

Number of Gears 4

Shifting Foot switching

Gearbox Ratios 5.33 / 3.02 / 2.04 / 1.54

Rear Wheel Ratio 4.16 :1 (with sidecar 5.2 :1)

Bevel/Crownwheel 6 / 25 teeth (with sidecar 5 / 26)

Electrical System

Ignition System Battery ignition

Generator Noris ZLZ 60/6/1600 1/L

Spark Plugs Bosch W 240 T1

Chassis

Designation 226/1

Frame Steel twin loop frame, welded

Front wheel suspension Long swing arm with suspension units and oil pressure dampers

Rear wheel suspension Long swing arm with suspension units and oil pressure dampers

Wheel rims 2.15B x 18 deep bed rims

Tyres, Front 3.25 x 18

Tyres, Rear 3.25 x 18

Brakes, Front Drum brake 160 mm / 6.29 in diameter, full width

Brakes, Rear Drum brake 160 mm / 6.29 in diameter, full width

Dimensions/Weights

Length x Width x Height 2090 x 660 x 975 mm (82.28 x 25.98 x 38.38 in)

Wheel Base 975 mm / 38.38 in

Fuel Tank Capacity 15 litres / 3.29 gal / 3.96 gal US

Unladen Weight with Full Tank 158 Kg / 348 lb

Permitted Weight Limit 325 Kg / 715 lb (with sidecar 480Kg / 1057 lb)

Idle/Riding Noise 77/81 phon, from 22/5/1957: 75/78 phon, from 22/12/1958: 81/82 phon

Clearance 105 mm / 4.13 in

Fuel Consumption Approx. 3.3 litres per 100 Km / 85 mpg / 71 mpg US

Oil Consumption Approx. 0.5 – 1 litres per 1,000 Km

Top Speed 128 Kph / 79 mph (with original sidecar 90 Kph / 55 mph)