Adler MB 250 RS (1953)

The Adler MB 250 RS is a 1953 motorcycle with a 2 cylinder, 2 stroke engine that has a capacity of 247 cc. It has a 54 x 54 mm bore x stroke and is air-cooled with petrol oil mix lubrication. The motorcycle features a multi-plate clutch and kick start with a 6V, 6Ah battery and Bosch coil ignition. It has twin Bing carburetors and a twin steel chrome exhaust system. The max power output is 19.2 kW at 7500rpm with a compression ratio of 1:5.75. The motorcycle has a 4-speed gearbox in the engine block controlled by a foot gearchange and features a chain final drive. The double tubular frame includes a sidecar adapter and the front suspension has twin swinging leading link forks with a shock absorber and steering damper. The rear suspension is a swinging fork adjustable for load and road conditions. The Adler MB 250 RS uses 3.25 x 16 inch tires and has drum brakes, 180 mm in diameter on both the front and back.

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Technical specifications:

Make Model: Adler MB 250 RS

Year: 1953

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: Bosch coil

Carburetor: Twin Bing carburetors

Exhaust System: Twin, steel, chrome

Max Power: 19.2 kW / 26 hp @ 7500 rpm

Compression Ratio: 1: 5.75

Clutch: Multi disc

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

Final Drive: Chain

Frame: Double tubular frame with sidecar adapter.

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

Rear suspension: Swinging fork adjustable for load and road conditions

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

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