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BMW R 61

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Make Model

BMW R 61

Year

1938 - 41

Engine

Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.

Capacity

600 cc / 36.6 cu in.
Bore x Stroke 70 x 78 mm
Compression Ratio

5.7:1

Cooling System Air cooled

Induction

1x Amal M75/426 S carburetor

Ignition

Battery ignition

Starting

Kick

Clutch Single plate, dry

Max Power

13.4 kW / 18 hp @ 4800 rpm

Transmission  /  Drive

4 Speed
Gear Ratio 1st 3.6 / 2nd 2.28 / 3rd 1. 7 / 4th 1.3:1
Frame Twin loop steel tubular frame

Front Suspension

Telescopic fork

Rear Suspension

Telescopic suspension

Front Brakes

200mm Drum

Rear Brakes

External shoe brake at the gearing on Cardan shaft

Front Tyre

3.00 -19"

Rear Tyre

3.50 -19"

Wet-Weight

184 kg / 405 lbs

Fuel Capacity 

14 liters / 3.6 US gal
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