Another change in 1926 was the ban on alcohol based fuels, forcing competitors to use road petrol.
Despite these changes the prestige of the Isle of Man TT Races had encouraged the Italian motor-cycle manufacturers Bianchi, Garelli and Moto Guzzi to enter.
The 7 lap (264.11 miles) 1926 Junior TT race was won by Alec Bennett riding a 350 cc overhead-camshaft Velocette motor-cycle, in 3 hours, 57 minutes and 37 seconds, at an average speed of 66.70 mph.
The Italian rider Pietro Ghersi was excluded from second place for using a different sparking-plug in the engine of his Moto Guzzi.
The 1926 Senior TT Race was less controversial and was won by Stanley Woods riding for Norton for the first-time by 4 minutes from Wal Handley.