Adler MB 250S (1955)

The Adler MB 250S is a 1955 motorcycle with a 2 cylinder, 2 stroke engine and a capacity of 247 cc. It has a kick start and a 6V, 6Ah battery with a 6 V 45/60 W ignition set, battery and coil. The carburetor is a single Bing carburetor, and the exhaust system is twin, steel, chrome. The motorcycle has a multi-plate clutch and a 4-speed gearbox housed in the engine block with a foot gearchange. The final drive is a chain that is fully enclosed. The frame is a double tubular frame with a sidecar adapter, and the front suspension is twin swinging leading link forks with a shock absorber and steering damper. The rear suspension has plunger shock absorbers that are adjustable for load and road conditions. The tires on both the front and back are 3.25 x 16 in., and the brakes are drums with a diameter of 180 mm. The motorcycle has a compression ratio of 1:6.6 and produces a maximum power of 13.1 kW / 18 hp at 5,590 rpm. Lubrication is achieved through a petrol oil mix at a ratio of 25:1.

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Technical specifications:

Make Model: Adler MB 250S

Year: 1955

Engine: 2 cylinder, 2 stroke, flat-crowned pistons

Capacity: 247 cc / 15.1 cub in.

Bore x Stroke: 54 x 54 mm

Cooling: Air cooled

Lubrication: Petrol oil mix 25:1

Clutch: Multi plate

Starting: Kick start

Battery: 6V, 6Ah

Ignition: 6 V 45/60 W ignition set, battery and coil

Carburetor: Single Bing carburetor

Exhaust System: Twin, steel, chrome

Max Power: 13.1 kW / 18 hp @ 5590 rpm

Compression Ratio: 1: 6.6

Clutch: Multi disc in oil bath

Transmission: 4 Speed gearbox housed in engine block, foot gearchange

Final Drive: Chain, fully enclosed

Frame: Double tubular frame with sidecar adapter.

Front suspension: Twin swinging leading link forks with shock absorber and steering damper

Rear suspension: Plunger shock absorbers, adjustable for load and road conditions

Tyres (front and back): 3.25 x 16 in.

Brakes (front and back): Drums, 180 mm diameter