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It went into some limited production in 1902, and by 1903 one of the company’s first advertisements appeared in the April issue of The Motor.The Triumph Cycle Company had already begun production of a dedicated motorcycle, the ‘No 1’ (1902) designed by Mauritz Shulte using a strengthened bicycle frame with a 2.25bhp single cylinder Belgian Minerva engine.The engines were used in many famous motorcycle marques and other equipment, such as early aircraft, chainsaws, cultivators such as those produced by Rotovators and light rail maintenance trucks. In light of JAP's development of high powered but light engines for speedway, some low volume pre-war car manufacturers, including the Morgan Motor Co and Reliant, used JAP engines to power their vehicles. The motorcycle engines were associated with racing success and were still used in speedway bikes well into the 1960s. Prestwich at first would purely deliver the same engine to the aircraft manufacturer, allowing them to make local modifications - mainly larger venturi tubes for the carburettor, to allow for greater air intake at altitude. Prestwich and Co incorporated as a private company to acquire the business founded by J. This use of the JAP extended into motor racing after the Second World War, with most were used in specialist UK lightweight formulas, or more extensively in Formula 3 racing after developments by John Cooper. John Alfred Prestwich was born in Kensington, London in 1874. He achieved a historical note with his development of silver bromide print paper, a process which he sold to George Eastman (founder of the Eastman Kodak Company) for one thousand pounds.His father, William Henry Prestwich, was a photographer and a member of the Royal Photographical Society, although he had previously worked for the Singer Sewing Machine Company in the U. At this time the family moved to Warmington House on Tottenham High Street.The first decade of the 20th century was a heady time for the newly developed motorcycle industry.As the “safety bicycle” had proven to be a winning design in the late 1800’s and had further developed with the advent of small “clip-on” internal combustion engines, many companies were eager to jump into the fray with their own branded machines.
The last full JAP motorcycle for many years rolled off the floor in 1908, but engine development and improvement continued unabated.
In 1901 Prestwich began construction on a prototype single-cylinder, four-stroke clip-on engine that was designed to attach to the front down tube of a bicycle frame.
The engine came in at 293cc and had an automatic inlet valve; the bore and stroke were 70 x 76mm and it produced 2.25hp at 1,600rpm.
In 1903 JAP premiered their first complete motorcycle at the Stanley Show, using a BSA frame with sprung forks and a vertically mounted 3.5hp ohv engine: there was also a “lightweight” model fitted with a 2.25hp inclined engine. The company also showed an early interest in racing when two machines fitted with 6hp JAP V-twins were entered for the 1905 Isle of Man Selection Trials and the 1906 Austrian international Cup Race.
A much larger 2714cc ohv V-twin racing engine was listed in 1908, designed specifically with that year’s IT in mind: water-cooled variants of the earlier singles and twins were also available by that year.