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The Empire Star was a standard motorcycle made by BSA at their factory in Small Heath, Birmingham. Named to commemorate the Silver Jubilee of King George V of the United Kingdom〔 and advertised as ''The Masterpiece of the Industry'',〔(【引用サイトリンク】title=BSA Motorcycling )〕 the Empire Star range was produced between 1936 and 1939, when it was developed into the BSA Gold Star and World War II stopped production. ==Development== Developed from the popular BSA Blue Star and designed by Val Page,〔(【引用サイトリンク】title=BSA 1938 Empire star 500 cc 1 cyl ohv )〕 the Empire Star range had the benefit several ideas Page had been developing at his previous employers, Ariel and Triumph motorcycles.〔 With a heavy frame and iron barrelled pushrod valves the Empire Star still had the legacy of the earlier BSAs however, and Page continued to lighten it and introduce engine tuning ideas throughout production. The overhead valve Empire Star was available as the ' 'B22', the ' 'R5' and the '' 'Q8' models.〔 Based on the standard Blue Star the 'Empire' featured an alloy primary chaincase with a special high compression piston and a hardened cylinder bore.〔 It also had some modern features, including a new foot-change gearbox and dry sump lubrication.〔 BSA launched the range of Empire Star models in 1936 with an effective demonstration of their reliability - a ' model was subjected to an endurance test of at Brooklands, averaging speeds of over round the oval track. This was followed by a endurance ride around the UK, visiting the West Country, Wales and the Lake District. The whole trip was completed successfully without the need for any spare parts - an important selling point for BSA in an increasingly competitive marketplace.〔(【引用サイトリンク】title=BSA Empire Star )〕 The outbreak of World War II ended production of the Empire Star in 1939 as the BSA factory switched to making munitions and producing the BSA M20 for the British Army. 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「BSA Empire Star」の詳細全文を読む スポンサード リンク
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