Sunbeam Results at the Isle of Man T.T.
| Year and Event | Rider | Result | Average Speed |
|---|---|---|---|
| 1914 Senior T.T. | Howard Davies | Joint 2nd | 48.35 mph |
| 1920 Senior T.T | Tommy de la Hay W. R. Brown | 1st 3rd | 51.79 m.p.h. 49.87 |
| 1921 Senior T.T | Alec Bennett | 4th | 53.47 m.p.h |
| 1922 Senior T.T. | Alec Bennett | 1st | 58.31 m.p.h. |
| 1923 Manx Amateur Motor Cycle Road Race | Len Randles W. H. Houghton | 1st 4th | 52.77 m.p.h 51.01 m.p.h. |
| 1924 Manx Amateur Motor Cycle Road Race | Len Randles R. C. Brown | 1st 2nd | 52.77 m.p.h. 51.01 m.p.h. |
| 1926 Manx Amateur Motor Cycle Road Race | D. Oldroyd | 3rd | 54.56 m.p.h. |
| 1927 Senior T.T. | Graham Walker | 5th | 64.72 m.p.h. |
| 1928 Senior T.T. | Charlie Dodson | 1st | 62.98 m.p.h. |
| 1928 Amateur Senior | W. L. Birch G. L. Emery | 2nd 3rd | 66.88 m.p.h. 65.79 m.p.h. |
| 1928 Amateur Junior | W. L. Birch | 4th | 57.94 m.p.h |
| 1929 Senior T.T. | Charlie Dodson Alec Bennett | 1st 2nd | 72.05 m.p.h. 70.51 m.p.h. |
| 1929 Junior T.T. | Charlie Dodson | 4th | 67.56 m.p.h. |
| 1930 Senior T.T. | Charlie Dodson | 4th | 71.99 m.p.h. |
| 1932 Senior Manx Grand Prix | J. Fletcher | 4th | 65.1 m.p.h. |
