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The Norton International or Cammy Norton is a Norton Motors Ltd overhead cam (OHC) motorcycle between 1931 and 1957. More than a ''TT replica'' sports roadster, the OHC Model 30, was 500 cc and the OHC Model 40 was 350 cc. During the 1930s it could be ordered from the Norton factory with all manner of racing parts fitted. Such factory bikes won many Isle of Man TT races during the 1930s, many of them 1-2-3 results. Norton factory riders on Inters, including Jimmie Guthrie, Jimmy Simpson, Stanley Woods were household names of the era. Production of the Model 30 and 40 International ended temporarily on the outbreak of World War II. Production of the Inter resumed for 1947, and continued until 1957. Although the engine continued almost from first to last unchanged, the famed featherbed frame was adopted for the 1953 models. By the 1950s though, the model was outdated and outclassed by the new twins and shared only the featherbed frame with its postwar Manx racing cousins, and only sold in small numbers. In the final years the Inter was not even mentioned in the catalog and was available only to special order. ==Development== The name ''International'' was first used by Norton both for its newly designed race bikes and also for the ''TT replica'' sports roadster in 1932. Overseen by Joe Craig, Arthur Carroll had designed an overhead-camshaft engine for the works racers and although it retained the bore and stroke of the Norton CS1 the Model 30 International was all new. The racing heritage led to quickly detachable wheels and ''hairpin'' type valve springs that could be changed rapidly when racing. In 1933, the forks and gearbox were redesigned〔 and in 1935, the Sturmey-Archer gearbox was replaced, as Sturmey-Archer had stopped making gearboxes, so Norton bought the rights to the design and commissioned Burman to produce them. These gearboxes proved so good they remained unchanged for the next 30 years,〔(【引用サイトリンク】title=Norton SOHC History )〕 although the external appearance was altered several times, and the gearchange mechanism fully enclosed and thus lubricated. In 1936, the engine was upgraded with an alloy head and barrel with a bronze liner, available as an option. In 1938 suspension was upgraded to ''plunger'' type,〔 also available as an option. Production of the Model 30 and 40 ended on the outbreak of World War II.〔(【引用サイトリンク】title=Norton International 490cc Model 30 )〕 After the war, production of the International Model 30 (500 cc) and Model 40 (350 cc) restarted with an iron head and barrel, as fitted to the pre-war CS1 and CJ Nortons. The suspension was upgraded to ''Norton Roadholder'' telescopic forks instead of girders and ''Clubmans'' versions were also produced without silencers and lights for racing use. Close ratios gearboxes were supplied as standard from 1947, and the alloy engine made a comeback in 1953 with a new version of the Featherbed frame. Volume production of the International ended in 1955, although small numbers were built to special order for two or three years after.〔(【引用サイトリンク】title=Norton International History )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Norton International」の詳細全文を読む スポンサード リンク
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