Adler MB 250S 
| 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 | | 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 | 125 km/h / 77 mph | | Colours | Black, Metal Green, Blue | | Source | Wikipedia, adler-oldtimer.de,adlermorotcycles.com, motorcycleclassics.com | 
The sports model of the MB250 with raiseddual exhaust, more power and deepsports handlebars. TheMB 250 S was an absolute rocket! Starting bike for many racersof private riders in on-roadand off-road competitions.The engine developedthen in 1956 and the motocrossdelivered a good20 hp. 
This bike was built for the American market, restored by Rolf Otto |