 It was won by Jack Porter, riding a New Imperial motorcycle at an average speed of over three laps of the Snaefell mountain course.The Ultra-Lightweight class was re-introduced in 1951 for motorcycles not exceeding 125 cc until discontinued in 1974, and then re-introduced for 1989, again for two-stroke 125 cc motorcycles, until dropped again due to lack of entries after 2004.The event was reintroduced 2008–2009 held on the four-mile Billown Circuit and then dropped from the race schedule on cost grounds for the 2010 races.