The Adler ISDT motorcycle was manufactured in 1957 and had a 247cc, 2-cylinder, 2-stroke engine with a bore and stroke of 54 x 54mm. It was air-cooled and used a petrol oil mix of 25:1 for lubrication. The clutch was a multi-plate design and it had a kick start with a 6V, 6Ah battery. The ignition was a 6V 45/60 W ignition set, battery, and coil, and it used a single Bing carburetor with a twin steel chrome exhaust system. The maximum power output was 13.1 kW / 18 hp at 5590 rpm with a compression ratio of 1:6.6. The transmission was a 4-speed gearbox housed in the engine block, with a fully enclosed chain as the final drive. The frame was a double tubular design with a sidecar adapter, and the front suspension used twin swinging leading link forks with a shock absorber and steering damper. The rear suspension had plunger shock absorbers that were adjustable for load and road conditions. The front and rear tires were 3.25 x 16 inches, and the brakes were drums with a diameter of 180mm.
Technical specifications:
Make Model: Adler ISDT
| Year | 1957 |
|---|---|
| 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 |
