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NSU 4 PS
1923
1923
The NSU 4 PS, introduced in 1923, represents a significant early milestone for the German motorcycle manufacturer. Born from NSU's desire to offer accessible motorized transportation, the 4 PS entered a market already populated by various lightweight machines. A notable competitor from the same era was the BMW R32, showcasing the differing engineering approaches of German manufacturers at the time. The NSU 4 PS aimed for simplicity and reliability, targeting a broader audience than some of the more complex and expensive motorcycles available.
At the heart of the NSU 4 PS lies a 498.0 ccm (30.39 cubic inches) single-cylinder engine. This powerplant generated a modest but adequate 6.5 HP (4.7 kW) at 3000 RPM. This output allowed the motorcycle to achieve a top speed of 80.0 km/h (49.7 mph), sufficient for navigating the roads of the era. The motorcycle's dry weight was a manageable 120.0 kg (264.6 pounds), contributing to its ease of handling. The fuel tank capacity of 9.00 litres (2.38 US gallons) offered a reasonable range for day trips and commuting.
Riding the NSU 4 PS offers a vintage experience, far removed from modern motorcycle comforts. The upright riding position, typical for motorcycles of that period, provided decent visibility. Suspension was rudimentary, meaning riders felt the bumps and imperfections of the road directly. Controls were simple and direct, requiring a degree of mechanical sympathy and understanding from the operator. Braking was also basic, demanding ample foresight and planning. The overall feeling is one of direct connection to the machine and the road.
The NSU 4 PS from 1923 appealed to a practical-minded audience seeking affordable and reliable transportation. Farmers, tradesmen, and those simply looking for an alternative to horses or bicycles would have found the 4 PS a viable option. While it lacked the outright power or sophisticated features of some of its contemporaries, its simplicity, ease of maintenance, and relatively low cost made it a compelling choice. Today, the NSU 4 PS is primarily of interest to vintage motorcycle enthusiasts and collectors who appreciate its historical significance and the unique riding experience it offers.
✅ Why buy this bike?
• Simple and robust design made it relatively easy to maintain, crucial in an era with limited specialized mechanics. • The 498cc single-cylinder engine provided adequate power for the roads of the 1920s, allowing reasonable speeds for the time. • Its relatively low production cost made it more accessible to a wider range of potential buyers than more complex or powerful motorcycles. • The NSU 4 PS was known for its reliability, a key factor for transportation in an era where breakdowns could be quite inconvenient. • The rigid frame and girder fork, while primitive by modern standards, were common technology and relatively easy to repair. • The direct belt drive system provided a direct connection to the rear wheel, offering a raw and engaging riding experience.⚠️ Things to consider
• The rigid frame and girder fork offered a very harsh ride, especially on the poorly maintained roads of the 1920s. • The lack of any real suspension or sophisticated braking systems made handling challenging and potentially dangerous, particularly in adverse conditions. • The single-cylinder engine, while reliable, produced significant vibrations, which could lead to rider fatigue on longer journeys. • The belt drive system was prone to slippage in wet conditions and required frequent adjustment to maintain optimal performance. • Starting the engine could be difficult, often requiring a combination of skill and brute force, especially when cold.The NSU 4 PS produces 6 HP, fitting A2 license limits (max 35 kW / 47 HP). For riders 18+.
Estimated average for 498cc class: 45-60 mpg (4.0-5.5 L/100km)
⛽ Tank: 9.00 litres (2.38 US gallons)
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