NSU 501 OSL 1939 - Specifications & Review

Introducing the 1939 NSU 501 OSL: A Sporty Classic with Timeless Appeal

The 1939 NSU 501 OSL stands as a remarkable testament to pre-war motorcycle engineering, captivating enthusiasts with its distinctive design and spirited performance. Positioned in the sport category, this motorcycle combines a robust build with an impressive power-to-weight ratio, making it one of the standout models of its era. As a product of the German manufacturer NSU, known for its innovative approach to engineering, the 501 OSL was tailored for riders seeking both thrill and reliability on the open road. With its classic lines and significant historical value, it has become a sought-after piece for collectors and vintage motorcycle aficionados alike.

At the heart of the NSU 501 OSL is a powerful single-cylinder, four-stroke engine, boasting a displacement of 494 ccm that generates a spirited 22 horsepower at 5,150 RPM. Riders will appreciate the seamless power delivery that propels this motorcycle to a top speed of 130 km/h (80.8 mph), allowing for exhilarating rides whether on winding country roads or straight stretches. The bore and stroke measurements of 80.0 x 99.0 mm further complement the engine's performance characteristics, providing a balance between torque and rev-happiness, making it an engaging ride for those who appreciate the nuances of classic motorcycles.

The 501 OSL is equipped with a sturdy steel frame that offers both durability and stability, ensuring a confident ride even at higher speeds. Its suspension system, combined with drum brakes at both the front and rear, exemplifies the engineering standards of the time, providing adequate stopping power and a smooth experience. Weighing in at 150 kg (330.7 pounds), this motorcycle's power-to-weight ratio of 0.1467 HP/kg enhances its agility, making it a joy to maneuver. Additionally, the kickstarter mechanism adds a vintage touch, allowing riders to engage with their machine in a way that modern motorcycles simply can't replicate.

Pros and Cons of the 1939 NSU 501 OSL

Pros:

1. Classic Design: The iconic styling of the 501 OSL turns heads and represents a significant era in motorcycle history.
2. Strong Performance: With 22 HP, the engine provides a thrilling ride, making it suitable for both spirited cruising and everyday enjoyment.
3. Lightweight Agility: Its relatively low weight enhances maneuverability, allowing for tighter cornering and a more engaging riding experience.

Cons:

1. Limited Modern Features: Lacking contemporary technology such as electronic ignition and fuel injection, it may require more maintenance and tuning.
2. Drum Brakes: While adequate for the time, drum brakes may not provide the stopping power and responsiveness that modern riders expect.
3. Kickstarter Only: The absence of an electric starter can be a drawback for those who prefer the convenience of modern starting systems, especially in cold weather.

In summary, the 1939 NSU 501 OSL is not just a motorcycle; it's a piece of history that embodies the spirit of its time. For those passionate about classic bikes, this model offers a unique blend of power, style, and nostalgia.