Adler MB250S

The Adler MB 250S was a air-cooled, two-stroke, twin cylinder Classic motorcycle produced by Adler in 1956. Claimed horsepower was 17.97 HP (13.4 KW) @ 5600 RPM.

Adler MB 250S
Production 1956
Class Classic
air-cooled, two-stroke, twin cylinder
Bore / Stroke 53.3mm x 53.3mm
Compression ratio 5.75:1
Horsepower 17.97 HP (13.4 KW) @ 5600RPM
Transmission Gear box: 4-speed, manual

Final Drive: chain

Clutch: wet multi-disc, manual
Suspension Front: leading link fork
Rear: adjustable plunger dual shocks
Brakes Front: 180mm diameter
Rear: 180mm diameter
Front Tire 3.25 x 16
Rear Tire 3.25 x 16
Wheelbase 49.49 inches (1257 mm)
Length 77.52 inches (1969 mm)
Width 25.59 inches (650 mm)
Weight 135.0 kg (wet)
Related Adler MB250 Adler MB250RS
Manuals Service Manual


A 53.3mm bore x 53.3mm stroke result in a displacement of just 247.0 cubic centimeters.


The bike has a 4-speed, manual transmission. Power was moderated via the wet multi-disc, manual.


It came with a 3.25 x 16 front tire and a 3.25 x 16 rear tire. Stopping was achieved via 180mm diameter in the front and a 180mm diameter in the rear. The front suspension was a leading link fork while the rear was equiped with a adjustable plunger dual shocks. The wheelbase was 49.49 inches (1257 mm) long.

1956 Adler MB 250SEdit


The 1955 Adler MB 250S sports an air-cooled, two-stroke, 247cc, twin cylinder engine paired to a four-speed manual transmission, and can produce a claimed 18 horsepower at 5600 rpm. It boasts standard features such as laced wheels, a high-mounted exhaust, a single saddle, dual shocks as a rear suspension, a leading link fork in the front, a drum braking system, and a large headlamp.