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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 50 cc Grand Prix motorcycle racing ： ウィキペディア英語版 50 cc Grand Prix motorcycle racing The 50 cc class was the ultra-lightweight class in Grand Prix motorcycle racing, and formed part of the Fédération Internationale de Motocyclisme (FIM) World Championships from 1962 until 1983; when the class was replaced by 80 cc. ==History and development of the class== The relative low cost and increasing availability of 50 cc motorcycles in the post-war period, spawned a number of club road racing events for this size of machine in the early 1950s. With the earliest events being held in Italy and in the UK. The potential of this class for providing entertaining but affordable racing was soon recognised with several national championships and in 1961 the FIM introduced The Coupe d' Europe, a series of international events for 50 cc machines, each with a minimum duration and run to established Grand Prix rules and regulations. The series attracted a variety of entries, but the dominating force were the work’s Kreidler team bikes. Based on a standard Kreidler Florett road bike, their single cylinder Kreidler Renn-Florett’s featured lightweight frames, a special cylinder head and barrel, twin 16 mm Bing carburettors feeding the engine through rotary valves and improved suspension and brakes. By the end of the season, with the addition of rudimentary streamlining and the increase of carburettor size to 17 mm, the four-speed two-stroke bikes could top over 85 mph. 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「50 cc Grand Prix motorcycle racing」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.