
AJS Model 20 500
Key specifications
Overview
Introducing the 1949 AJS Model 20 500, a classic motorcycle that epitomizes the spirit of post-war British engineering. Positioned in the all-rounder category, the Model 20 is not just a machine; it's a testament to the innovation and resilience of the era. With its striking design and robust performance, this motorcycle appeals to both seasoned riders and collectors alike, offering a charming blend of nostalgia and practicality. The Model 20's timeless aesthetics, combined with its capable engineering, make it a standout choice for those looking to embrace the golden age of motorcycling. At the heart of the AJS Model 20 lies a 498cc twin-cylinder, four-stroke engine that delivers a respectable 20 horsepower at 6800 RPM. This power is complemented by a 4-speed gearbox and a wet multiplate clutch, providing smooth gear transitions that enhance the overall riding experience. With a top speed of 137 km/h (85.1 mph), the Model 20 offers exhilarating performance on both city streets and open roads. Riders will appreciate the bike's manageable weight of 178 kg (392.4 lbs), which contributes to its agile handling and maneuverability. The air-cooled engine, featuring a compression ratio of 7.0:1 and a reliable carburettor fuel system, ensures that the Model 20 is as dependable as it is thrilling to ride. Equipped with advanced features for its time, the AJS Model 20 boasts a single cradle frame that provides stability and strength. The telescopic front suspension and twin-shock rear suspension work together to deliver a comfortable ride over various terrains, while the expanding drum brakes at both ends offer effective stopping power. With a fuel capacity of 13.5 litres (3.57 gallons), this motorcycle is designed for longer journeys, making it an ideal companion for adventurous spirits. The classic kick starter adds a touch of authenticity, allowing riders to connect with their machine in a way that modern electric starters simply can't replicate. In summary, the 1949 AJS Model 20 500 is more than just a motorcycle; it's a piece of history that offers a unique riding experience. Its blend of vintage charm and practical performance makes it a compelling choice for anyone looking to explore the joys of classic motorcycling.
Pros
- Classic Design: The AJS Model 20 showcases a vintage aesthetic that appeals to collectors and enthusiasts alike.
- Balanced Performance: With a good power-to-weight ratio, the bike offers an engaging and responsive riding experience.
- Comfortable Suspension: The combination of telescopic front and twin shock rear suspension ensures a smooth ride, even on less-than-ideal roads.
Cons
- Limited Power: With only 20 HP, some riders may find the performance underwhelming compared to modern standards.
- Drum Brakes: While effective for its time, the drum brakes may not provide the same stopping power as contemporary disc brakes.
- Kick Start Only: The absence of an electric start might be a drawback for those who prefer modern conveniences.
Technical details
Source specification data
- Make
- AJS
- Model
- Model 20 500
- Category
- Allround
- Starter
- Kick
- Power
- 20.00 HP (14.6 kW)) @ 6800 RPM
- Clutch
- Wet multiplate
- Gearbox
- 4-speed
- Ignition
- Magneto
- Top Speed
- 137.0 km/h (85.1 mph)
- Fuel System
- Carburettor
- Bore X Stroke
- 66.0 x 72.8 mm (2.6 x 2.9 inches)
- Compression
- 7.0:1
- Displacement
- 498.00 ccm (30.39 cubic inches)
- Cooling System
- Air
- Engine Details
- Twin, four-stroke
- Transmission Type Final Drive
- Chain
- Dry Weight
- 178.0 kg (392.4 pounds)
- Fuel Capacity
- 13.50 litres (3.57 gallons)
- Overall Width
- 710 mm (28.0 inches)
- Overall Height
- 1,050 mm (41.3 inches)
- Overall Length
- 2,190 mm (86.2 inches)
- Power Weight Ratio
- 0.1124 HP/kg
- Seat
- Dual
- Wheels
- Spoked
- Rear Tyre
- 3.25-19
- Frame Type
- Single cradle
- Front Tyre
- 3.25-19
- Rear Brakes
- Expanding brake (drum brake)
- Front Brakes
- Expanding brake (drum brake)
- Rear Suspension
- Twin shock
- Front Suspension
- Telescopic