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The Honda CR93 was twin cylinder 125cc four stroke racing machine, built initially in 1961, and used in GP racing for many years. The last known position secured in a GP was by Dr Marcus Wigan (MRW of 'Motorcycle Sport') at 11th in the Silverstone 125cc GP round in 1975, in the race won by Kent Anderson on a 125cc Suzuki two stroke. The engine was a gear driven double overhead cam four valve twin cylinder four stroke twin, with two long taper megaphone exhausts making a distinctive and very loud sound at the Honda-designated peak rpm of 12,000 (and even more at the 18,000 rpm used by later riders.It had a dry clutch and a five speed gearbox. Racing the CR93 was covered by "Motorcycle Sport", then the companion monthly magazine to Motor Sport, and published at the same premises 〔Wigan, M. R. (1973). Track test Honda CR93: Bantam Club Enduro Part Two.. (including the Bantam bit). Motorcycle Sport, 14(11), 433-434.〕 Ron Pladdys made a three-cylinder version from two engines, and manufactured sets of 182cc barrels and matching pistons to allow the CR93 to be used in 250cc races. The Pladdys Three was the subject of an MRW racer test in Motorcycle Sport. The 182 barrels and pistons were used in the 1974 Lightweight Manx GP in the Isle of Man, also reported by MRW. Illustrations of the engine from the manual were reported in Motorcycle Sport,〔Wigan, M. R. (1972). Racer test: The classic complex CR93: Honda 125cc CR93. Motorcycle Sport, 13(10), 374-376〕 Honda made a limited number of fully legal road-going versions of the CR93 Honda UK held spares for the CR93, doled out sparingly by Alf Briggs until 1975, when they ran out.The last new head and pistons were used for the 125cc GP at Silverstone. ==References== 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「Honda CR93」の詳細全文を読む スポンサード リンク
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