The R37 was equipped with aluminium alloy cylinder heads which, combined with overhead valves, gave the machine almost twice the horsepower of earlier engines. This resulted in the R37 having a substantial advantage over the competition - BMW R37 riders won the German championship every year from 1925 to 1929.
Production 1925-1926, 152 built.
Engine
Type: M2B 36
Four-stroke horizontally opposed twin
Bore x Stroke 68 x 68 mm,
Displacement 494 cc
Power: 16 hp at 4,000 rpm
Compression Ratio 6.2 : 1
Valve dia. 26 mm
Clutch Single plate, dry
Engine Lubricating System - Oil Pump
Gearbox 3 speed
Electrical System - Bosch, magneto ignition
Chassis
Frame - Twin loop tubular frame
Twin cantilever spring
Rigid
Front wheel suspension
Rear wheel suspension
Wheel rims 26 x 2.5"
Tyres, Front and rear 26 x 3"
Front Brake: Drum 150 mm
Rear Brake: Block
Dimensions/Weights
Length x Width x Height 2100 x 800 x 950 mm
Wheel Base 1380 mm
Fuel Tank Capacity 14 litres
Weight, wet: 134 Kg
Fuel Consumption Approx. 4 litres per 100 Km
Oil Consumption Approx. 3 litres per 1,000 Km
Top Speed 115 Kph
