[7] Although he never suffered any serious injuries,[2] Porter's TT career was hampered by many retirements, as he finished only 4 races out of 22 starts.

Porter was nicknamed the "Solitary Scot", due to his habit of travelling alone through Europe to compete in international races on his own bikes.

[2] Porter died on 20 November 1952 and is buried at Comely Bank Cemetery, Edinburgh, along with his wife Margaret.

[10] In 2008, two albums of photographs and postcards of TT races, from 1921 onwards, which once belonged to Porter, were sold at auction by Bonhams for £3,220 (including premium).

[1] In 2012, his granddaughter showed some of his trophies and other memorabilia, on the BBC programme Antiques Roadshow.