<P> The 1911 Isle of Man TT was the first time the Junior TT race took place, open to 300 cc single - cylinder and 340 cc twin cylinder motorcycles, contested over five laps of the new 37.5 - mile (60.4 km) Snaefell Mountain Course . The first event on the new course was the Junior TT Race contested by 35 entrants, won by Percy J. Evans riding a Humber motor - cycle at an average race speed of 41.45 mph (66.71 km / h). The 1912 event was the first to limit the Junior TT to only 350 cc machines and this engine capacity prevailed until 1994 when replaced by the 600 cc Supersport class . </P> <Dl> <Dd> <Ul> <Li> 1911 For single cylinder motorcycles not exceeding 300 cc engine capacity and 340 cc twin cylinder motorcycles . </Li> <Li> 1912--1948 For motorcycles not exceeding 350 cc engine capacity . </Li> <Li> 1949--1953 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Snaefell mountain course . </Li> <Li> 1954--1959 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Clypse Course . </Li> <Li> 1960--1976 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Mountain Course . </Li> <Li> 1977--1993 for motorcycles not exceeding 350 cc engine capacity and held on the Mountain Course . </Li> <Li> 1994 onwards for motorcycles not exceeding 600 cc engine capacity and held on the Mountain Course . </Li> </Ul> </Dd> </Dl> <Dd> <Ul> <Li> 1911 For single cylinder motorcycles not exceeding 300 cc engine capacity and 340 cc twin cylinder motorcycles . </Li> <Li> 1912--1948 For motorcycles not exceeding 350 cc engine capacity . </Li> <Li> 1949--1953 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Snaefell mountain course . </Li> <Li> 1954--1959 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Clypse Course . </Li> <Li> 1960--1976 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Mountain Course . </Li> <Li> 1977--1993 for motorcycles not exceeding 350 cc engine capacity and held on the Mountain Course . </Li> <Li> 1994 onwards for motorcycles not exceeding 600 cc engine capacity and held on the Mountain Course . </Li> </Ul> </Dd> <Ul> <Li> 1911 For single cylinder motorcycles not exceeding 300 cc engine capacity and 340 cc twin cylinder motorcycles . </Li> <Li> 1912--1948 For motorcycles not exceeding 350 cc engine capacity . </Li> <Li> 1949--1953 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Snaefell mountain course . </Li> <Li> 1954--1959 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Clypse Course . </Li> <Li> 1960--1976 FIM World Championship event for motorcycles not exceeding 350 cc engine capacity and held on the Mountain Course . </Li> <Li> 1977--1993 for motorcycles not exceeding 350 cc engine capacity and held on the Mountain Course . </Li> <Li> 1994 onwards for motorcycles not exceeding 600 cc engine capacity and held on the Mountain Course . </Li> </Ul>

Who won the isle of man tt race