[1] The 350cc Junior TT race was won by Cyril Williams riding an AJS motor-cycle and the 250cc Lightweight class by R. O. Clark with a Levis machine.
However, Cyril Williams hit gear-box problems at the Creg-ny-Baa corner on the last lap and free-wheeled and pushed to the finish-line located at the Nobles Park playing fields in the town of Douglas.
A new lap record was set by George Dance riding a Sunbeam of 40 minutes and 43 seconds, an average speed of 55.62 mph.
AJS thought they could repeat the success of the 1914 Junior TT with a newly developed 2.75 hp (2.05 kW) ohv-engined machine.
R. O. Clark riding for the Levis marque finished in 4th place overall and was within the 30 minute limit for The Motor Cycle Cup Trophy for the smaller 250cc motor-cycles.