1924 Isle of Man TT


The 1924 Isle of Man Tourist Trophy saw the introduction of the Ultra-Lightweight class for motorcycles of 175 cc capacity that was run only twice, in 1924 and 1925. This was the second year of the Sidecar race that would also be dropped after 1925.
The Ultra-Lightweight TT began with a massed-start for competitors rather than pairs as with the normal time-trial format of the TT races. The winner of the first Ultra-Lightweight TT was Jock Porter riding a New Gerrard at an average speed of.
The Junior TT race was won by Ken Twemlow on a New Imperial at an average speed of. In the same Junior race, Jimmie Simpson set a new lap record of 35 minutes and 5 seconds at an average speed of on an AJS – the first average lap-speed over 60 mph. The Lightweight and Senior TT races were run in conjunction, and Eddie Twemlow riding a New Imperial won the six-lap race in 4 hours, 5 minutes and 3 seconds, an average speed of.
The Senior TT, like the Junior race, was also run at a record breaking pace and was the first with a race-average speed over. The six-lap race was won by Alec Bennett riding a Norton in 3 hours, 40 minutes and 24. 6 seconds, with an average speed of.

[Senior TT] (500cc)

[Junior TT] (350cc)

6 laps – Mountain Course.
RankRiderTeamSpeedTime
1 Kenneth TwemlowNew Imperial56.68 mph4:04.49.0
2 S. OllerheadDOT54.91 mph4:07.26.2
3 I. H. R. ScottAJS54.55 mph4:09.01.6
4 Cecil AshbyMontgomery53.39 mph4:14.27.4
5 Harold J. WillisMontgomery52.80 mph4:17.18.8
6 J. L. E. EmersonDOT4:20.39.8
7 F. Simpson JnrExcelsior4:28.55.2
8 L. NicholsonOEC-Blackburne4:31.38.0
9 F. R. MarstonAJS4:31.39.0
10 J. W. ShawZenith4:43.48.4

[Lightweight TT] (250 cc)

6 laps – Mountain Course.
RankRiderTeamSpeedTime
1 Edwin TwemlowNew Imperial55.44 mph4:05.03.0
2 H. F. BrocklebankCotton52.85 mph4:17.05.0
3 J. CookeDOT52.54 mph4:18.03.0
4 L. J. CridlandJES51.84 mph4:22.03.0
5 P. PikeLevis51.16 mph4:25.31.0
6 H. F. HarrisNew Imperial50.50 mph4:29.01.0
7 F. Simpson JnrExcelsior4:32.50.0
8 C. G. S. CleareOK-Supreme4:38.50.0
9 C. W. JohnstonCotton4:40.23.0
10 Geoff S.DavisonLevis4:52.40.0

[Ultra-Lightweight TT]

It was held on Wednesday, June 25th, 1924 over a distance of 113 miles and 380 yards, 3 laps of 37.75 miles each. The machines were limited of cylinder capacity not exceeding 175cc. All seventeen riders started the race simultaneously, only twenty yards separating the last numbered man from the first. Eleven riders finished.

[Sidecar TT]

It was held on Wednesday, June 25th, 1924 at 2:00pm over a distance of 150 miles and 1,680 yards, 4 laps of 37.75 miles each. Sidecar TT machines were limited of cylinder capacity not exceeding 600cc. Out of 10 entries, nine started the race at one minute intervals and only five finished.