NSU 251 OSL 1938 - Specifications & Review

Introducing the timeless 1938 NSU 251 OSL, a quintessential example of pre-war German engineering that successfully blends sportiness with practicality. At a time when motorcycles were beginning to evolve beyond mere transportation, the NSU 251 OSL emerged as a standout in the sport category, appealing to both competitive riders and enthusiasts alike. With its elegant design and robust performance, this motorcycle captures the spirit of an era defined by innovation and adventure, making it a prized possession for collectors and vintage motorcycle aficionados.

Beneath its classic exterior lies a spirited 242cc single-cylinder, four-stroke engine that delivers a respectable 10.5 horsepower at 5200 RPM. This power translates into a thrilling top speed of 100 km/h (62.1 mph), making the NSU 251 OSL not just a pretty face but a formidable contender on the open road. Riders will appreciate the seamless 4-speed gearbox and responsive chain final drive, which, combined with the bike's lightweight frame at just 126 kg (277.8 pounds), create an agile and nimble riding experience. The air-cooled engine, coupled with a traditional carburettor fuel system, provides a raw and engaging connection to the road that modern riders often crave.

The NSU 251 OSL is not only about performance; it is also rich in features that enhance the riding experience. Its open double steel frame offers both strength and flexibility, while the expanding drum brakes at both the front and rear ensure reliable stopping power. A kick starter adds to the vintage charm, harkening back to a time when mechanical simplicity was celebrated. With a fuel capacity of 11.5 liters (3.04 gallons), riders can embark on longer journeys without the constant worry of refueling, making it an ideal choice for leisurely weekend rides or spirited sport outings.

Pros:

1. Nimble Handling: The lightweight design and responsive 4-speed gearbox deliver an agile riding experience, perfect for both city commuting and spirited country rides.
2. Classic Aesthetics: The vintage charm of the NSU 251 OSL appeals to enthusiasts and collectors, making it a stunning addition to any motorcycle lineup.
3. Solid Performance: With a top speed of 100 km/h and a robust engine for its size, the motorcycle offers a thrilling ride without compromising on practicality.

Cons:

1. Limited Power: While adequate for its time, the 10.5 HP output may feel underwhelming compared to modern counterparts, limiting its performance on highways.
2. Drum Brakes: The expanding drum brake system, while reliable, may not provide the same level of stopping power as contemporary disc brakes, especially under heavy braking conditions.
3. Kick Start Only: The absence of an electric starter can be cumbersome for some riders, especially in challenging situations or unfavorable weather conditions.

In summary, the 1938 NSU 251 OSL is a captivating blend of history, performance, and style, making it a cherished choice for those who appreciate the artistry of classic motorcycles.