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For several decades Triumph's 'twin' engine design by Edward Turner dictated the direction of the whole motorcycle industry. For many enthusiasts the best twin of all time is the Bonneville. No classic bike has wider appeal, both in the UK and USA, and the continuing appeal of the breed is greatly enhanced by the modern bikes sold under the Bonneville name. This new edition features the major evolutions of the model since 2000, when Steve Wilson's highly respected book was first published in Haynes 'Great Bikes' series.