BMW R27

BMW R27 Production Date 1962-1967 Engine
Internal designation	226/2
Type	four-stroke single-cylinder vertical
Bore/stroke	68 x 68 mm
Cubic capacity	15 in.3 / 247 cm3
Maximum power	18 HP at 7400 U /min
Compression ratio	8.2 : 1
Valves per cylinder	OHV
Carburation system	1 carburettor Typ Bing 1 / 26 / 68
Engine lubrication	forced-feed lubrication
Oil pump	gear pump
Power Transmission
Clutch	single discs, dry
Number of gears	4
Shifting	foot shifting
Gear ratios	5.33 / 3.02 / 2.04 / 1.54
Rear wheel ratio	4.16 : 1 (with sidecar 5.2 : 1)
Bevel/crown wheel	6 / 25 teeth (with sidecar 5 / 26)
Electrical System
Alternator	Bosch LJ/CJE 60/6/1800 R 5
Ignition	battery ignition
Spark plugs	Bosch W 240 T 1, Beru 240/14 or Champion L 85
Suspension
Designation	226/2
Type of frame	steel twin-loop frame, welded
Front suspension	long swing arm with suspension units and oil-pressure dampers
Rear suspension	Langarmschwinge mit Feder at nen and oil-pressure dampers
Wheel rims	deep-bedwheel rims 2.15 B x 18
Tires front	3.25 x 18
Tires rear	3.25 x 18
Brakes front	drum brake Ø 160 mm, full hub
Brakes rear	drum brake Ø 160 mm, full hub
Dimensions and Weights
Length x width x height	82 x 26 x 38 inches / 2090 x 660 x 975 mm
Wheel base	54.7 inches / 390 mm; with sidecar 1415 mm
Tank capacity	4.0 gals. / 15 liters
Unladen weight, full tank	357 lbs. / 162 kg
Permitted loading	716 lbs. / 325 kg; with sidecar 1,058 lbs. / 480 kg
Performance
Riding/exhaust noise	81 / 81 phon (from 12.10.1962 82/80 DIN phon)
Fuel consumption	60 MPG (ca. 3.9 liters / 100 km)
Oil consumption	ca. 0.5 - 1 l / 1000 km
Top speed	81 MPH (81 MPH / 130 km/h; with sidecar 56 MPH / 90 km/h)