
AJS Model 31 650 Swift
Key specifications
Overview
### 1960 AJS Model 31 650 Swift: A Classic Allrounder Step back into the golden age of motorcycling with the 1960 AJS Model 31 650 Swift, a quintessential example of British engineering. Positioned in the allround category, the Model 31 embodies the spirit of versatility and reliability that AJS was renowned for during this era. Its timeless design and robust capabilities make it not only a head-turner at shows but also a delightful companion for weekend rides and spirited jaunts on winding roads. With a rich history and a dedicated following, the Model 31 is a motorcycle that remains cherished by enthusiasts and collectors alike. At the heart of the AJS Model 31 is a powerful 646cc twin, four-stroke engine that produces a commendable 31.4 HP at 6000 RPM. This configuration delivers a smooth and responsive throttle, allowing for exhilarating acceleration while maintaining a steady ride. The engine is paired with a 4-speed gearbox that offers seamless shifting, making it ideal for both city commuting and longer journeys. Its air-cooled design and wet multiplate clutch contribute to the motorcycle's enduring reliability, ensuring that riders can trust their AJS whether navigating urban traffic or cruising down country lanes. The Model 31 is equipped with features that reflect the engineering advancements of its time. The double cradle frame provides excellent stability, while the hydraulic telescopic front suspension and twin shock Girling rear suspension work together to absorb bumps and enhance rider comfort. Disc brakes may have been the future, but the expanding drum brakes on both front and rear still offer solid stopping power, reminiscent of the era's charm. With a fuel capacity of 16 liters, riders can enjoy extended rides without frequent stops, making it a practical choice for those who yearn for adventure. **
Pros
- Robust Engine Performance: The 646cc engine delivers smooth power and a responsive ride, making it versatile for various riding conditions.
- Classic Aesthetic Appeal: With its vintage design and stylish lines, the Model 31 remains a head-turner among classic motorcycle aficionados.
- Comfortable Suspension: The combination of hydraulic telescopic front forks and twin shock rear suspension ensures a comfortable ride over diverse terrains.
Cons
- Drum Brakes: While adequate for the time, the drum brakes may lack the stopping power and responsiveness of modern disc systems.
- Kickstart Only: The absence of an electric start may deter some riders seeking convenience, particularly in urban settings.
- Weight Consideration: Weighing in at 176 kg (388 lbs), the Model 31 may feel cumbersome to novice riders compared to lighter modern motorcycles.
Technical details
Source specification data
- Make
- AJS
- Model
- Model 31 650 Swift
- Category
- Allround
- Starter
- Kick
- Power
- 31.40 HP (22.9 kW)) @ 6000 RPM
- Clutch
- Wet multiplate
- Gearbox
- 4-speed
- Ignition
- Bobine
- Fuel System
- Carburettor
- Bore X Stroke
- 72.0 x 79.3 mm (2.8 x 3.1 inches)
- Compression
- 7.5:1
- Displacement
- 646.00 ccm (39.42 cubic inches)
- Cooling System
- Air
- Engine Details
- Twin, four-stroke
- Transmission Type Final Drive
- Chain
- Dry Weight
- 176.0 kg (388.0 pounds)
- Fuel Capacity
- 16.00 litres (4.23 gallons)
- Power Weight Ratio
- 0.1784 HP/kg
- Seat
- Dual
- Wheels
- Spoked
- Rear Tyre
- 3.25-19
- Frame Type
- Doble cradle
- Front Tyre
- 3.25-19
- Rear Brakes
- Expanding brake (drum brake)
- Front Brakes
- Expanding brake (drum brake)
- Rear Suspension
- Twin shock Girling
- Front Suspension
- Hydraulic telescopic