At the FICM (later known as FIM) meeting in London near the end of 1948, it was decided there would be a motorcycle World Championship along Grand Prix lines. It would be a six-race annual series with points being awarded for a placing and a point for the fastest lap of each race. There would be five classes: 500 cc, 350 cc, 250 cc, 125 cc and 600 cc sidecar. The historic Isle of Man TT would be one of those races, and this toughest and most dangerous of Grand Prix motorcycle races would be a mainstay on the GP calendar until 1976.
Harold Daniell, on a Norton, won the 500 cc Senior TT event at an average speed of 86.93 mph. Les Graham, on an AJS Porcupine 500 cc twin, led the Senior race until the last lap when his magneto drive sheared. He pushed the bike past the finish line in tenth place. As he had finished the race he gained one championship point for recording the fastest lap.
Four clubman races were included; the Clubmans Senior, Clubmans Junior, Clubmans Lightweight, and the new Clubmans 1,000 cc.
^Isle of Man Examiner 1949 TT Races page 4 Friday 20 August 1948 "As a result of representations made by various insular authorities, the Auto-Cycle Union is to reconsider its requests the 1949 TT Races be held on the 6th, 8th and 10th June 1949."