 Despite the conditions, Geoff Duke riding the works Gilera and led Amm riding for Norton by 14 seconds on lap 1.On the second lap, Duke lapped in 26 minutes and 23 seconds at an average speed of 86.97 mph and Amm lapped at an average speed of 86.49 to reduce the lead to just 2 seconds.Further heavy rain and low cloud on the Mountain Section reduced speed further and on lap 2 and Amm used "feet-down" tactics on the slower corners.