sentences:  The 1912 event was the first to limit the Junior TT to only 350 cc machines and this engine capacity prevailed until 1994.The 2012 specification for entries into the Junior TT race are defined as;-
  
  
  The lap record for the Junior TT is 17 minutes and 31.328 seconds, at an average speed of set by Michael Dunlop on lap 2 of the 2018 Isle of Man TT 600cc Supersport Junior TT Race 1.The race record for a four-lap Junior TT is 1 hour, 11 minutes and 28.059 seconds at an average race speed of set by Dean Harrison during the 2018 600cc Supersport TT Race 2.