The 1923 Manx Amataeur Road Races a forerunner of the Manx Grand Prix were held on 20 September 1923.[1] The first winner was Les Randles riding a 500c Sunbeam motor-cycle.[2]
During an early morning practice session, the Isle of Man competitor Ned Brew crashed fatally in an accident at the Hillbery Corner.[3]
Thursday 20 September 1923 – 5 laps (188.75 miles) Isle of Man TT Mountain Course.
| Rank | Rider | Team | Speed | Time | |
|---|---|---|---|---|---|
| 1 | Les Randles | Sunbeam | 52.77 mph | 3:34.32.0 | |
| 2 | Kenneth Twemlow | New Imperial | 52.46 mph | 3:35.49.0 | |
| 3 | Arthur J.Marsden | Douglas | 51.74 mph | 3:38.18.0 | |
| 4 | W.H.Houghton | Sunbeam | 51.01 mph | 3:42.03.0 | |
| 5 | C.Waterhouse | Sunbeam | 50.69 mph | 3:43.19.0 | |
| 6 | J.W.Bezzant | Norton | 47.67 mph | 3:57.09.0 | |
| 7 | Edwin Twemlow | 350cc Sunbeam | |||
| 8 | H.V.Prescott | Scott | |||
| 9 | N.Owen | Norton | |||
| 10 | V.F.Crosthwaite | Beadmore Precision |