Adler MB 250 (1955)

The Adler MB 250 was a motorcycle produced in 1955 with a 2 cylinder, 2 stroke engine that had a capacity of 247cc. It used a petrol oil mix for lubrication and had a multi-disc wet clutch with kick start. The bike had a 4-speed gearbox housed in the engine block with a foot gearchange and a chain final drive that was fully enclosed. The frame was a double tubular design with a sidecar adapter and the front suspension featured twin swinging leading link forks with shock absorbers and a steering damper. The rear suspension used plunger shock absorbers that were adjustable for load and road conditions. The bike weighed 135 kg dry and 145 kg wet with a fuel capacity of 12 L and a reserve of 3.8 L. It had an average consumption of 3.6 L/100 km and a top speed of 116 km/h. The Adler MB 250 was available in black, metal green, and blue.

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Technical specifications:

Make Model: Adler MB 250

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 disc, wet

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: 11.8 kW / 16 hp @ 5590 rpm

Compression Ratio: 1: 5.75

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

Dimensions: Length 1968 mm / 77.5 in. Width 650 mm / 25.6 in. Height 935 mm / 36.8 in.

Wheelbase: 1257 mm / 49.5 in.

Dry Weight: 135 kg / 298 lbs

Wet Weight: 145 kg / 320 lbs

Fuel Capacity: 12 L / 3.2 US gal

Reserve: 3.8 L / 1 US gal

Average Consumption: 3.6 l/100 km / 27.8 km/l / 65.3 US mpg

Top Speed: 116 km/h / 72 mph

Colours: Black, Metal Green, Blue

Source: Wikipedia, adler-oldtimer.de, adlermorotcycles.com, motorcycleclassics.com