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Difference between revisions of "AJS Model 18"
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|transmission= 4-speed AMC gearbox to final drive chain | |transmission= 4-speed AMC gearbox to final drive chain | ||
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The '''[[AJS]] Model 18 500 Statesman''' | The '''[[AJS]] Model 18 500 Statesman''' and AJS Model 18S were both single cylinder, [[four-stroke]] 500 cc British [[motorcycle]]s produced between 1960 and 1965. Claimed [[horsepower]] was 27.36 HP (20.4 KW) @ 5600 [[RPM]]. They were almost identical to the [[Matchless G80]] and both were produced in the same [[Associated Motor Cycles]] (AMC) London factory from 1945 to 1966. These bikes represent the end of the era of big British singles, as when AMC merged with [[Norton Motorcycle Company|Norton]] production concentrated on twins. | ||
==Development== | |||
The AJS Model 18 was developed from a design from the 1930s, despite which it was still being manufactured 30 years later. The AJS was updated when a springer frame rear suspension was made available for 1949, to become the Model 18S. The suspension was a vast improvement on the rigid rear end - which had given a bouncy ride. Each of the two 'Candlestick' shocks held only 50 cc of SAE 20 weight oil. They were prone to leaks and were replaced by the larger diameter 'Jampot' shocks on the 1951 version. | |||
==Engine== | ==Engine== | ||
The engine was a [[air cooled]] single cylinder, four-stroke. A 86.0mm [[bore]] x 85.5mm [[stroke]] result in a [[displacement]] of just 498.0 cubic [[centimeter]]s. | The engine was a [[air cooled]] single cylinder, four-stroke. A 86.0mm [[bore]] x 85.5mm [[stroke]] result in a [[displacement]] of just 498.0 cubic [[centimeter]]s. | ||