What is the engine displacement of the 1959 AJS 31 650 Swift?

The 1959 AJS 31 650 Swift has an engine displacement of 646.0 ccm (39.42 cubic inches).

How much does the 1959 AJS 31 650 Swift weigh?

The 1959 AJS 31 650 Swift has a dry weight of 176.0 kg (388.0 pounds).

1959 AJS 31 650 Swift Price, Specs, Review

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Review

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The 1959 AJS 31 650 Swift represents classic British motorcycling design, featuring a 646cc parallel-twin engine. While horsepower figures aren't listed, the engine is likely tuned for accessible torque and a smooth power delivery, suitable for various riding conditions. The Swift weighs 176 kg and has a four-speed gearbox, aiming for an engaging ride, complemented by a hydraulic telescopic front suspension. Ergonomically, the motorcycle offers a traditional upright riding position, designed for comfort during extended rides. The 16-liter fuel tank provides a reasonable range, reducing the need for frequent refueling stops. The drum brakes, typical for the time, necessitate a more careful approach to braking. This motorcycle would likely appeal to enthusiasts of vintage British bikes. Its straightforward design and the usable power of its 646cc engine make it suitable for weekend rides and classic motorcycle gatherings. The 1959 AJS 31 650 Swift offers a glimpse into the past, providing a unique and engaging riding experience.

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License Class (EU)

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Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.

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Fuel Economy & Running Costs

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Estimated average for 646cc class: 35-50 mpg (5.0-7.0 L/100km)

⛽ Tank: 16.00 litres (4.23 US gallons)

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Insurance Class

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Insurance grouping for AJS 31 650 Swift (646cc):

📋 Group 15-20+ — performance class, higher premiums

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Insurance Calculator (UK est.)

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Personalised premium estimate for the AJS 31 650 Swift (UK rates):

💡 Estimate based on UK market averages. For real quotes, compare on Compare the Market, MoneySuperMarket, GoCompare.

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Buy New & Used

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Find new and used AJS 31 650 Swift 1959 listings:

🛒 eBay Motors 🏍️ Cycle Trader 🇬🇧 Auto Trader UK 🔍 Google Listings

💡 Third-party listings. MotoBike Info is informational only.

👤 Final premium varies by rider age, history, location.

AJS 31 650 Swift

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