BMW R 37

BMW R 37 Date 1925-1926

Number sold 152

Price 2.900,- RM

Engine

Internal Designation M 2 B 33
Engine type four-stroke two-cylinder flat-twin
bore x stroke 68 x 68 mm
displacement 494 cm3
output 16 PS at 4000 rpm
compression ratio 6,2 : 1
valves ohv
carburetion system 1 carburettor, Typ BMW Spezial three-valve 26 mm
engine lubricating forced-feed lubrication
Oil pump gear pump

Power transmission

Clutch single discs, dry
no. of gears 3
Shifting manual
Gear ratios 2,27 / 1,50 / 1,08
rear wheel ratio 1 : 4,41 (with sidecar 1 : 5,36)
bevel/crown wheel 17 / 75 teeth (with sidecar 14 / 75 teeth)

Electrical system

Alternator magneto generator on request
Ignition Bosch magneto ignition
Spark plugs Bosch W 175

Suspension

Designation R 37
frame twin-loop tubular frame
front wheel suspension twin cantilever spring
rear wheel suspension rigid
wheel rims 26 x 2,5
tyres, front 26 x 3
tyres, rear 26 x 3
brakes, front drum brake 150 mm
Brakes rear block brake

Dimensions and weights

Length x width x height 2100 x 800 x 950 mm
Wheel base 1380 mm
Tank capacity 14 l
Unladen weight, full tank 134 kg (with Original-sidecar 184 kg)
Load rating k.A.
Fuel consumption ca. 4 l / 100 km
Oil consumption ca. 3 l / 1000 km
Top speed 115 km/h

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