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A few years after its R32, BMW launched a second motorcycle model: the R37. Still powered by a 494 cm3 flat-twin, this machine makes a spectacular leap in performance. The engine here delivers 16 horsepower at 4000 rpm, i.e. twice the power.
Produced in 152 copies, the BMW was sold for 2900 Reichmarks, almost 30% more expensive than the R32. Although its engine had the same cubic capacity as that of the first BMW motorcycle, it was clearly differentiated by several technical solutions. Valves placed at the head of the cylinder head, 26mm carburetors, a compression ratio pushed to 6.2: 1, a different fin layout to improve cooling made it a much faster machine than the R32. With the R37, the brand had just created its first sports motorcycle. The transmission was, as usual, provided by a universal joint. Marketed for two years, from 1925 to 1926, the BMW R37 had a very successful racing career, winning many races of the time.
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What you must remember
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Opinion
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Model marketed in
1925
1926
Performances
-
Max speed:
approx. 115 km / h -
Consumption
medium: 4 l
The technical aspect
BMW R37 1925
- Frame
- Frame: two closed loops in parallel steel tubes
- Tank: 14 liters
- Seat height: 720 mm
- Length: 2,100 mm
- Width: 800 mm
- Height: 950 mm
- Wheelbase: 1380 mm
- Weight in running order: 134 kg
- Train before
- Fork + leaf spring
- 1 drum Ø 150 mm
- Transmission
- 3-speed gearbox
- secondary by cardan
- Rear axle
- rigid
- Motor
- Twin cylinder
flat
, 4 stroke - Cooling: by air
- Carburetor Ø 26 mm
- 2 valves per cylinder
-
494 cc
(68 x 68 mm) -
16
ch
at 4000 rpm - Compression: 6.2: 1
- Crit’air:
Detached pieces
exhaust
motor
fluid
electricity
filtration
braking
chain kit
Competitors
Gallery
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