The NSU Sportmax (1954-56) was a motorcycle built with a single cylinder, 4-stroke, OHC engine with a capacity of 247cc/15 cub in. It had a maximum power output of 20.6 kW/28 hp at 10,000 rpm and a top speed of 212 km/h/131.7+ mph. The engine was air/oil cooled and had a dry sump lubrication system. The clutch was multi-plate and it had a four-speed block transmission with a final chain drive. The bike featured a single-bar stamped plate with engine protection and suspended frame. The front suspension was swinging link and the rear suspension was telescopic. The brakes were drum brakes for both front and back. It had a wet weight of 155kg/342lbs. The NSU Sportmax was equipped with a BING 2/26/25 carburetor and a twin steel exhaust system. It was started using a kick start and the ignition was powered by a coil. It had a compression ratio of 7.4:1. The NSU Sportmax was a powerful and speedy motorcycle that was a popular choice for racing.
Technical specifications:
Make Model: NSU Sportmax
| Year | 1954 – 56 |
|---|---|
| Engine | Single cylinder, 4 stroke, OHC |
| Capacity | 247 cc / 15 cub in |
| Bore x Stroke | 69 x 66 mm |
| Cooling | Air/Oil cooled |
| Lubrication | Dry sump |
| Clutch | Multi-plate |
| Starting | Kick start |
| Ignition | Coil |
| Carburetor | BING 2/26/25 |
| Exhaust System | Twin, steel |
| Max Power | 20.6 kW / 28 hp @ 10 00 rpm |
| Compression Ratio | 7.4:1 |
| Transmission | Four speed block |
| Final Drive | Chain |
| Frame | Single-bar stamped plate with engine protection and suspended |
| Front suspension | Swining link suspension |
| Rear suspension | Telescopic suspension |
| Brakes (front and back) | Drum |
| Wet Weight | 155 kg / 342 lbs |
| Top Speed | 212 km/h / 131.7+ mph |
| Source | audi.com |
