AJS Model 31: history, specs, pictures
|AJS Model 31 650|
|Also called||650 Swift|
air-cooled, four-stroke, parallel twin cylinder, OHV, 2 valves per cylinder
|Bore / Stroke||71.1mm x 71.1mm|
|Horsepower||43.05 HP (32.1 KW) @ 6000RPM|
|Transmission||Gear box: 4-speed, manual
Final Drive: chain
|Suspension||Front: telescopic fork
Rear: dual shocks
|Front Tire||3.25 -19|
|Rear Tire||3.50 -19|
|Fuel Capacity||4.23 Gallon (16.00 Liters)|
The AJS Model 31 650 Swift was a air-cooled, four-stroke, parallel twin cylinder, OHV, 2 valves per cylinder Classic motorcycle produced by AJS in 1957. Claimed horsepower was 43.05 HP (32.1 KW) @ 6000 RPM.
Engine[edit | edit source]
Drive[edit | edit source]
The bike has a 4-speed, manual transmission. Power was moderated via the wet multi-disc, manual.
Chassis[edit | edit source]
It came with a 3.25 -19 front tire and a 3.50 -19 rear tire. Stopping was achieved via drum in the front and a drum in the rear. The front suspension was a telescopic fork while the rear was equiped with a dual shocks.
1957 - 1966 AJS Model 31 650[edit | edit source]
The 1957 AJS Model 31 650 has, at its heart, an air-cooled, four-stroke, 646cc, parallel twin powerhouse paired to a four-speed manual transmission, and can reach a maximum power output of 43 horsepower at 6000 rpm.
It comes standard with features such as a blacked-out frame, a suspension package composed of a front telescopic fork and dual shocks as a rear suspension, a dual seat, a chromed, dual exhaust system, laced wheels, full fenders, and a dual tone paint scheme.