Difference between revisions of "AJS Model 20"
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{{DISPLAYTITLE:{{PAGENAME}}: review, history, specs}} | {{DISPLAYTITLE:{{PAGENAME}} 500: review, history, specs}} | ||
{{Infobox Motorcycle | {{Infobox Motorcycle | ||
|name = '''AJS Model 20''' | |name = '''AJS Model 20''' | ||
|image = | |image = [[File:1955 AJS Model 20.jpg|frameless]] | ||
|aka = Model | |aka = Model 20 500, Model 20 500 | ||
|manufacturer = [[AJS]] | |manufacturer = [[AJS]] | ||
|parent_company = | |parent_company = | ||
| Line 59: | Line 9: | ||
|model_year = | |model_year = | ||
|predecessor = | |predecessor = | ||
|successor = | |successor = [[AJS Model 31]] | ||
|class = [[Classic]] | |class = [[Classic]] | ||
|engine = twin, four-stroke | |engine = 498cc [[air-cooled]] twin, four-stroke | ||
|bore_stroke = 66.0mm x 72.8mm | |bore_stroke = 66.0mm x 72.8mm | ||
|compression = 7.3:1 | |compression = 7.3:1 | ||
| Line 95: | Line 45: | ||
|competition = | |competition = | ||
}} | }} | ||
The '''[[AJS]] Model 20 500''' is a twin, [[four-stroke]] allround [[motorcycle]] produced between 1948 and 1959. It could reach a top speed of 85 mph (137 km/h). Claimed [[horsepower]] was 19.58 HP (14.6 KW) @ 6800 [[RPM]]. The Model 20 was finally discontinued when the 646 cc [[AJS Model 31]] replaced it in the autumn of 1958. | |||
==Variants== | |||
The Model 20B was the model imported into the USA. | |||
==Engine== | ==Engine== | ||
The engine was a [[air cooled]] twin, four-stroke. A 66.0mm [[bore]] x 72.8mm [[stroke]] result in a [[displacement]] of just 498.0 cubic | The engine was a [[air cooled]] twin, four-stroke. A 66.0mm [[bore]] x 72.8mm [[stroke]] result in a [[displacement]] of just 498.0 cubic [[centimeter]]s. The engine features a 7.0:1 [[compression ratio]]. | ||
==Drive== | |||
The bike has a 4-speed [[transmission]]. The [[final drive]] was via [[chain]]. Power was moderated via the wet multi-plate. | |||
==Chassis== | |||
It [[cam]]e with a 3.25-19 front [[tire]] and a 3.25-19 rear tire. Stopping was achieved via expanding [[brake]] ([[drum brake]]) in the front and a expanding brake (drum brake) in the rear. The front suspension was a telescopic while the rear was equipped with a twin shock. The Model 20 500 is fitted with a 3.57 Gallon (13.50 Liters) [[fuel tank]]. The bike weighs just 392.42 pounds (178.0 Kg). | |||
==1948 - 1961 AJS Model 20 500== | ==1948 - 1961 AJS Model 20 500== | ||
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The 1948 AJS Model 20 500 has, at its heart, an air-cooled, four-stroke, 498cc, parallel twin cylinder powerplant mated to a four-speed manual transmission. It comes standard with features such as laced wheels, a suspension package composed of a front telescopic fork and dual rear shocks, a solo, sprung seat, wide handlebars, an analogue instrument cluster, a dual exhaust system, full-fenders, a blacked-out frame, and a large, 17-liter (4.5-gallon) fuel tank. | The 1948 AJS Model 20 500 has, at its heart, an air-cooled, four-stroke, 498cc, parallel twin cylinder powerplant mated to a four-speed manual transmission. It comes standard with features such as laced wheels, a suspension package composed of a front telescopic fork and dual rear shocks, a solo, sprung seat, wide handlebars, an analogue instrument cluster, a dual exhaust system, full-fenders, a blacked-out frame, and a large, 17-liter (4.5-gallon) fuel tank. | ||
[[Category: AJS motorcycles|Model 20]] | |||
[[Category: 1940s motorcycles]] | |||
[[Category: 1950s motorcycles]] | |||
[[Category:Classic motorcycles]] | [[Category:Classic motorcycles]] | ||
Revision as of 20:44, 23 May 2019
 | |
| Manufacturer | AJS |
|---|---|
| Also called | Model 20 500, Model 20 500 |
| Production | 1948 - 1959 |
| Successor | AJS Model 31 |
| Class | Classic |
| Engine | 498cc air-cooled twin, four-stroke |
| Bore / Stroke | 66.0mm x 72.8mm |
| Compression ratio | 7.3:1 |
| Top speed | 85 mph (137 km/h) |
| Horse Power | 19.58 HP (14.6 KW) @ 6800RPM |
| Ignition type | magneto |
| Battery | 7.0:1 |
| Transmission | Gear box: 4-speed Final Drive: chain |
| Suspension | Front: telescopic Rear: twin shock |
| Brakes | Front: expanding brake (drum brake) Rear: expanding brake (drum brake) |
| Front Tire | 3.25-19 |
| Rear Tire | 3.25-19 |
| Dimensions | L 86.22 inches (2190 mm) W 27.95 inches (710 mm) H 41.34 inches (1050 mm) |
| Weight | 392.42 pounds (178.0 Kg) (dry), 178.0 kg (wet) |
| Fuel capacity | 3.57 Gallon (13.50 Liters) |
| Manuals | Service Manual |
| Tech Specs · Brochures · Reviews · Ads · Videos | |
The AJS Model 20 500 is a twin, four-stroke allround motorcycle produced between 1948 and 1959. It could reach a top speed of 85 mph (137 km/h). Claimed horsepower was 19.58 HP (14.6 KW) @ 6800 RPM. The Model 20 was finally discontinued when the 646 cc AJS Model 31 replaced it in the autumn of 1958.
Variants
The Model 20B was the model imported into the USA.
Engine
The engine was a air cooled twin, four-stroke. A 66.0mm bore x 72.8mm stroke result in a displacement of just 498.0 cubic centimeters. The engine features a 7.0:1 compression ratio.
Drive
The bike has a 4-speed transmission. The final drive was via chain. Power was moderated via the wet multi-plate.
Chassis
It came with a 3.25-19 front tire and a 3.25-19 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The front suspension was a telescopic while the rear was equipped with a twin shock. The Model 20 500 is fitted with a 3.57 Gallon (13.50 Liters) fuel tank. The bike weighs just 392.42 pounds (178.0 Kg).
1948 - 1961 AJS Model 20 500
The 1948 AJS Model 20 500 has, at its heart, an air-cooled, four-stroke, 498cc, parallel twin cylinder powerplant mated to a four-speed manual transmission. It comes standard with features such as laced wheels, a suspension package composed of a front telescopic fork and dual rear shocks, a solo, sprung seat, wide handlebars, an analogue instrument cluster, a dual exhaust system, full-fenders, a blacked-out frame, and a large, 17-liter (4.5-gallon) fuel tank.