emu
Adler Motorcycles

1952-1953 Adler M250S

Specifications

Engine:
Air cooled two-stroke twin, 247cc, B/S 54x54mm
Compression ratio 5.75:1
Amal 20E1B carburettor (1952)
Bing 1/22 (1953)
multi-plate clutch in oil bath
two ignition coils

Power: 18 HP @ 5600 rpm

Lubrication: 25:1 petroil mixture.

Fuel consumption: 3.56 litres/100k @ 80 km/h

Gearbox

    4 speed with neutral indicator
    Oil capacity: 1.2 litres
    Gearshift lever on left side of engine
    Shift pattern: 4 up - neutral, 1st, 2nd, 3rd, 4th.
    1st gear = 2.80:1
    2nd gear = 1.53:1
    3rd gear = 1.11:1
    4th gear = 0.81:1
    primary drive = 3.44:1
    final drive = 2.0:1 (solo), 2.25:1 (sidecar)
    NB: All MB/MBS models have same gearbox and gear ratios.

Max speed: 125 km/h

Weight: 135 kg (1952)

Weight: 145 kg (1953)

Wheels: 1.85 x 16" steel rims, 36 spokes.

Brakes: 180mm x 30mm.

Tyres: 3.25x 16 front and rear.

Maximum all-up weight without sidecar: 295 kg; with sidecar: 420 kg

Frame: double cradle steel tube with sidecar attachment points.

Fuel tank: rubber mounted 12 litre with 3 litre reserve.

Front suspension: leading link with integral damping.

Rear suspension: hydraulic spring dampers.

Electrical system: 6 volt 90 watt flywheel magneto.

Steering lock.

Lockable toolbox.

Adjustable steering damper.

Enclosed rear chain.

Folding rear guard.

Upswept dual exhaust. .



Phil Aynsley Photography
Phil Aynsley Photography
Thousands of quality photographs featuring Ducati, Moto Guzzi, MV Agusta and numerous other marques. An index to many of the amazing galleries on his site is available here:
Phil Aynsley's Motorcycle Photos