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| {{DISPLAYTITLE:{{PAGENAME}}: history, specs, pictures}}
| | The '''[[AJS]] Model 31650 Swift''' is a twin, [[four-stroke]] allround [[motorcycle]] produced between 1959 and 1966. Claimed [[horsepower]] was 30.71 HP (22.9 KW) @ 6000 [[RPM]]. |
| {{Motorcycle
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| |name = AJS Model 31 650
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| |photo=ajs-model-31-650-1957-1966-0.jpg
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| |aka = 650 Swift
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| |manufacturer = AJS
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| |parent_company =
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| |production = 1957
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| |model_year =
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| |predecessor =
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| |successor =
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| |class = Classic
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| |engine = air-cooled, four-stroke, parallel twin cylinder, OHV, 2 valves per cylinder
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| |bore_stroke = 71.1mm x 71.1mm
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| |compression = 7.5:1
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| |top_speed =
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| |power = 43.05 HP (32.1 KW) @ 6000RPM
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| |torque =
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| |ignition = magneto
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| |spark_plug =
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| |battery =
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| |transmission = Gear box: 4-speed, manual <br>
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| Final Drive: [[chain]] <br>
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| Clutch: wet multi-disc, manual <br>
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| |frame =
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| |suspension =Front: telescopic fork <br>
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| Rear: dual shocks
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| |brakes =Front: drum <br>Rear: drum
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| |front_tire = 3.25 -19
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| |rear_tire = 3.50 -19
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| |rake_trail =
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| |wheelbase =
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| |length =
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| |width =
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| |height =
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| |seat_height =
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| |dry_weight =
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| |wet_weight =
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| |fuel_capacity = 4.23 Gallon (16.00 Liters)
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| |oil_capacity =
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| |fuel_consumption =
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| |turning_radius =
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| |related =
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| |competition =
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| }}
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| 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. | |
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| ==Engine== | | ==Engine== |
| A 71.1mm [[bore]] x 71.1mm [[stroke]] result in a [[displacement]] of just 646.0 cubic centimeters. | | The engine was a [[air cooled]] twin, four-stroke. A 72.0mm [[bore]] x 79.3mm [[stroke]] result in a [[displacement]] of just 646.0 cubic [[centimeter]]s. The engine features a 7.5:1 [[[[compression ratio]]]]. Fuel was supplied via a overhead [[valve]]s (ohv). |
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| ==Drive== | | ==Drive== |
| The bike has a 4-speed, manual transmission. Power was moderated via the wet multi-disc, manual. | | The bike has a 4-speed [[transmission]]. The [[final drive]] was via [[chain]]. Power was moderated via the wet multiplate. |
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| ==Chassis== | | ==Chassis== |
| 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. | | It [[cam]]e with a 3.25-19 front [[tire]] and a 3.25-19 rear tire. Stopping was achieved via expanding [[b[[rake]]]] ([[drum brake]]) in the front and a expanding brake (drum brake) in the rear. The front suspension was a [[hydraulic]] telescopic while the rear was equiped with a twin shock girling. The Model 31650 Swift is fitted with a 4.23 Gallon (16.00 Liters) [[fuel tank]]. The bike weighs just 388.01 pounds (176.0 Kg). |
| | | [[Category: AJS motorcycles]] |
| ==1957 - 1966 AJS Model 31 650==
| | [[Category: 1960s motorcycles]] |
| [[File:ajs-model-31-650-1957-1966-0.jpg|600px|1957 - 1966 AJS Model 31 650]]
| | [[Category: 1950s motorcycles]] |
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| 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. | |
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| 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.
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| ==In Media==
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| * [https://motopixel.org/pixel/some-people#ajs-model-31 Some People]
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| * [https://motopixel.org/pixel/today-in-britain#ajs-model-31 Today in Britain]
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| [[Category:Classic motorcycles]] | |
| [[Category:Road motorcycles]]
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| [[Category:AJS motorcycles|Model 31]] | |
| [[Category:1960s motorcycles]] | |
| [[Category:1950s motorcycles]] | |