Arthur James Bell (6 September 1914 – 7 August 1972, Belfast, United Kingdom) was a British (Northern Irish) motorcycle road racer who became known for his short post-World War II Isle of Man TT career that came to notice with his second-place finish in the 1947 Isle of Man TT on a second-hand 500cc Norton he bought himself on which he led for three of the seven laps.

Bell began motorcycling as a teenager despite the opposition of his father, who at one time forced him to get rid of his Sunbeam motorcycle, but by 1938 Bell prevailed and rode in minor events progressing to a second-place finish in the North West 200 an event that still takes place in Northern Ireland.

Riding his 1939 Norton, he participated in several races in the immediate post-World War II period including the 1946 Cookstown 100 event where he recorded the fastest lap time of 76.60 mph and winning the 1947 500cc Ulster Grand Prix race with an average speed of 91.25 mph (146 km/h) in a time of 2 hours 43 minutes 1 second, while setting a new lap record of 94.79 mph (151.17 km/h). Bell also won the 1947 North West 200.

Following his 1947 Isle of Man performance, Norton picked him up as a works rider for the following season. He did not finish in his TT Junior 350cc race, however, the next season he claimed first place in the 500cc Senior TT race and third place in the 350cc Junior event. In 1949 he placed third and fourth in the TT as well as taking the North West 200 again. Norton introduced the Featherbed frame in 1950 contributing to his 1950 first place in the 350cc Junior race and second place in the 500cc Senior race. Further placings in the 1950 Dutch TT and Swiss Grand Prix ensured his position in the 1950 Grand Prix season with seventh and fourth place respectively in the 500cc and 350cc championship standings. Bell also claimed the North West 200 for a third time.

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