NSU 4PS 1923 - Specifications & Review

1923 NSU 4PS Motorcycle: A Classic Sport Machine

The 1923 NSU 4PS stands as a remarkable representation of early 20th-century motorcycling, merging engineering innovation with the sporting spirit of its time. NSU, a pioneer in the motorcycle world, crafted this model to appeal to enthusiasts who craved speed and agility. Positioned squarely in the sport category, the NSU 4PS was designed for those who wished to embrace the thrill of the open road while experiencing the charm of vintage engineering. With its classic lines and robust frame, this motorcycle is not only a collector's item but a testament to the ingenuity of its era.

At the heart of the NSU 4PS lies a spirited 498cc twin-cylinder, four-stroke engine, capable of delivering a modest yet exhilarating 6.5 horsepower at 3,000 RPM. This power, while seemingly modest by modern standards, allows the 4PS to reach a top speed of 80 km/h (49.7 mph), making it a lively contender on the roads of the 1920s. Riders can expect a smooth and responsive experience as the power is efficiently transferred to the rear wheel via a belt drive system, providing a unique riding characteristic that distinguishes it from many of its contemporaries. The 4PS strikes a balance between agility and comfort, thanks to its steel frame that supports a lightweight design of just 120 kg (264.6 pounds).

The NSU 4PS boasts several key features that highlight its advanced technology for the time. The carburettor system, specifically the Pallas model, is meticulously designed to optimize fuel delivery, ensuring optimal performance and efficiency. With a bore and stroke measuring 63.0 x 80.0 mm (2.5 x 3.1 inches), this engine configuration contributes to a pleasing blend of torque and responsiveness, allowing for spirited acceleration. Moreover, with a fuel capacity of 9 liters (2.38 gallons), the 4PS promises a respectable range for those longer rides, allowing riders to fully appreciate the freedom that comes with classic motorcycling.

Pros:

1. Lightweight and Agile: Weighing in at just 120 kg, the 4PS offers excellent maneuverability, making it easy to handle in both urban environments and open roads.
2. Classic Design: The timeless aesthetic of the NSU 4PS captures the essence of early motorcycling, making it a desirable piece for collectors and vintage enthusiasts alike.
3. Smooth Performance: The combination of a reliable engine and belt drive system results in a smooth and responsive ride, ideal for those looking to enjoy a spirited jaunt.

Cons:

1. Limited Power: With only 6.5 HP, the 4PS may not satisfy those seeking high-speed thrills compared to modern motorcycles.
2. Basic Features: Lacking the modern conveniences found in contemporary bikes, the 4PS may pose challenges regarding comfort and technology for today's riders.
3. Availability of Parts: As a vintage motorcycle, sourcing replacement parts can be a challenge, potentially limiting its usability for daily riding.

In summary, the 1923 NSU 4PS is a charming slice of motorcycling history that combines the excitement of sport riding with classic craftsmanship. Whether you are a collector or an avid enthusiast, this motorcycle encapsulates a bygone era, inviting you to experience the thrill of the ride as it was meant to be.