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.
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 |
