What is the engine displacement of the 1958 AJS 20 500?

The 1958 AJS 20 500 has an engine displacement of 498.0 ccm (30.39 cubic inches).

How much horsepower does the 1958 AJS 20 500 have?

The 1958 AJS 20 500 produces 20.0 HP (14.6 kW )) @ 6800 RPM of power.

What is the top speed of the 1958 AJS 20 500?

The 1958 AJS 20 500 has a top speed of 137.0 km/h (85.1 mph).

How much does the 1958 AJS 20 500 weigh?

The 1958 AJS 20 500 has a dry weight of 178.0 kg (392.4 pounds).

1958 AJS 20 500 Price, Specs, Review

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Review

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The 1958 AJS 20 500 is a classic motorcycle powered by a 498cc engine that produces 20 horsepower at 6800 RPM, allowing it to reach a top speed of 137 km/h. This air-cooled engine provides a straightforward and engaging riding experience, focusing on usable power and a distinctive exhaust note. Weighing in at 178 kg and featuring a 13.5-liter fuel tank, the AJS 20 500 is well-suited for comfortable day trips and enjoying the open road. The bike's ergonomics are designed for comfortable, upright riding, making it accessible to a wide range of riders. The telescopic front suspension and drum brakes offer a traditional feel, requiring a deliberate and thoughtful approach to riding. This setup emphasizes a connection to the road and a focus on enjoying the journey. The AJS 20 500 is ideal for riders who appreciate the charm and simplicity of vintage motorcycles. It's a great choice for those seeking an authentic riding experience and a connection to motorcycling history. Its classic styling and reliable performance make it a rewarding machine for leisurely rides and vintage motorcycle events.

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Pros (Advantages)

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✅ Why buy this bike?

• Classic British single-cylinder thumper offers a delightful, authentic vintage riding experience. • Relatively simple mechanicals make home maintenance and repairs more approachable for enthusiasts. • Robust engine design, if well-maintained, offers good longevity and reliability for its era. • Distinctive exhaust note and rhythmic thrum of the big single are incredibly charismatic and enjoyable. • Strong club support and parts availability within the vintage AJS community ease ownership challenges. • Aesthetically pleasing design, a true classic that turns heads and appreciates in value.

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Cons (Disadvantages)

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⚠️ Things to consider

• Performance is modest by modern standards; highway cruising can be strained and top speed limited. • Braking system (drum brakes) requires significant anticipation and is less effective than modern discs. • Vibration from the large single-cylinder engine can be fatiguing on longer rides. • Electrical system (6V positive earth) can be temperamental and less reliable than modern setups. • Kick-starting a 500cc single requires a specific technique and can be physically demanding.

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License Class (EU)

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The AJS 20 500 produces 20 HP, fitting A2 license limits (max 35 kW / 47 HP). For riders 18+.

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Fuel Economy & Running Costs

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Estimated average for 498cc class: 45-60 mpg (4.0-5.5 L/100km)

⛽ Tank: 13.50 litres (3.57 US gallons)

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Insurance Class

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