NSU 501 SS 1931 - Specifications & Review

The 1931 NSU 501 SS: A Sporty Legend of Its Time

Step back into the thrilling era of the early 1930s, and you’ll find the NSU 501 SS standing proud as a symbol of innovation and speed. As a sport motorcycle, the 501 SS was designed for those who craved performance and excitement on two wheels. NSU, a prominent German manufacturer at the time, carved a niche for itself by blending engineering prowess with spirited design. With its striking lines and robust build, the 501 SS appealed to both seasoned riders and newcomers eager to make their mark on the open road.

At the heart of the NSU 501 SS lies a potent single-cylinder, four-stroke engine with a displacement of 494 cc. This powerplant delivers an impressive 20 HP at 4800 RPM, propelling the bike to a top speed of 125 km/h (77.7 mph). Riders will appreciate the lively acceleration and the solid mid-range torque, which makes overtaking a breeze. The bore and stroke measurements of 80 x 99 mm create a harmonious balance between power and smoothness, while the air-cooled design ensures reliability even during spirited rides. The chain final drive provides direct power transfer, enhancing the overall riding experience, making every twist of the throttle feel personal and exhilarating.

The NSU 501 SS also boasts several key features that elevate it above its contemporaries. Its robust chassis, paired with expanding drum brakes at both the front and rear, delivers controlled stopping power, ensuring that riders can tackle curves and descents with confidence. The motorcycle's lightweight construction—158 kg (348.3 pounds)—contributes to its agile handling, making it a joy to maneuver through both city streets and winding country lanes. Moreover, with a fuel capacity of 11 liters (2.91 gallons), the NSU provides a commendable range, allowing riders to enjoy longer journeys without the immediate need for refueling. The classic kick starter adds a touch of nostalgia, inviting enthusiasts to engage with their machines in the most traditional way possible.

#### Pros and Cons of the 1931 NSU 501 SS

Pros:

1. Performance-Oriented Engine: With 20 HP, the single-cylinder engine offers lively acceleration and a thrilling top speed, perfect for sport riding.
2. Lightweight and Agile: At only 158 kg, the 501 SS is easy to handle, providing excellent maneuverability for both urban and rural riding.
3. Classic Aesthetic: The timeless design and quality craftsmanship make it a standout piece for collectors and vintage motorcycle enthusiasts alike.

Cons:

1. Limited Braking Technology: The drum brakes, while effective for their time, may feel less responsive compared to modern disc brake systems.
2. Kick Starter Only: The absence of an electric start can be a challenge for some riders, especially in less-than-ideal conditions.
3. Fuel Capacity: While reasonable for its era, the 11-liter tank may limit long-distance travel without frequent stops for refueling.

In summary, the 1931 NSU 501 SS is not just a motorcycle; it’s a piece of history that encapsulates the spirit of early motorcycle sport. With its impressive performance and classic appeal, it continues to captivate riders and collectors today.