Editing Isle of Man TT (section)

====Clubman TT and Production TT====
The Clubman races with Lightweight, Junior and Senior classes were held for production motorcycles from [[1947 Isle of Man TT|1947]] until [[1956 Isle of Man TT|1956]].<ref>[http://www.iomtt.com/TT-Database/Events.aspx?meet_code=TT47%20%20&era=2 1947 TT races, overview] IoM TT.com. Retrieved 26 September 2015</ref> A Senior 1000&nbsp;cc class provided an opportunity for [[Vincent Motorcycles|Vincent motorcycles]].<ref>[http://www.iomtt.com/TT-Database/Events/Races.aspx?meet_code=TT50&race_seq=1 1950 Clubman TT 1000&nbsp;cc class results] IoM TT.com. Retrieved 26 September 2015</ref> The riders were little-known, but as the stars were barred from entering the class, it provided a stepping-stone for future-stars but resulted in less spectator-interest. The series became dominated by one model – the [[BSA Gold Star]],<ref name="recce" /><ref>[http://www.iomtt.com/TT-Database/Events/Races.aspx?meet_code=TT56&race_seq=2 1956 Clubman TT Junior class results] IoM TT.com. Retrieved 26 September 2015</ref><ref>[http://www.iomtt.com/TT-Database/Events/Races.aspx?meet_code=TT56&race_seq=1 1956 Clubman TT Senior class results] IoM TT.com. Retrieved 26 September 2015</ref> and with little competition from other manufacturers, was discontinued. When previewing the impending re-introduction of a specification-controlled, roadster-based class in March 1967, ''David Dixon'' wrote: "''lack of inter-make rivalry probably put the final nail in the coffin''".<ref name="recce">[[The Motor Cycle|''Motor Cycle'']], 9 March 1967, pp.284–286 ''Roadsters on the Magic Lap. A Production-TT Recce in Manxland'' by ''David Dixon''. Accessed 26 September 2015</ref>

Writing in UK monthly magazine ''Motor Cyclist Illustrated'', racing journalist Ray Knight, who had achieved a lap speed of nearly 88&nbsp;mph on a [[Triumph Tiger 100]] [[Standard motorcycle|roadster]]-based racing motorcycle in the [[Manx Grand Prix]],<ref>[http://www.manxgrandprix.org/Mountain-Course-Database/Events/Races.aspx?meet_code=MGP63&race_seq=2 1963 Senior race results, Competitor Ray Knight, Hughes Triumph] {{Webarchive|url=https://web.archive.org/web/20160304035517/http://www.manxgrandprix.org/Mountain-Course-Database/Events/Races.aspx?meet_code=MGP63&race_seq=2 |date=4 March 2016 }}, Manx Grand Prix.Org official website, Retrieved 19 October 2015</ref><ref>[http://www.manxgrandprix.org/Mountain-Course-Database/Events/Races.aspx?meet_code=MGP64&race_seq=3 1964 Senior race results, Competitor Ray Knight, Hughes Triumph] {{Webarchive|url=https://web.archive.org/web/20160304035602/http://www.manxgrandprix.org/Mountain-Course-Database/Events/Races.aspx?meet_code=MGP64&race_seq=3 |date=4 March 2016 }}, Manx Grand Prix.Org official website, Retrieved 19 October 2015</ref><ref>[http://www.iomtt.com/TT-Database/competitors.aspx?ride_id=2459&filter=K Ray Knight, Competitor Profile], IoM TT.com official website, Retrieved 19 October 2015</ref> commented in early 1965 that the [[Auto-Cycle Union|ACU]] had refused a request from manufacturers to run a production TT race, which he thought was a missed opportunity, particularly considering the dwindling support for the 500&nbsp;cc race.<ref>Motor Cyclist Illustrated, January 1965, p.41 ''More Production racing''. Accessed 19 October 2015</ref>[[File:Start lightweight TT IMG 0018.jpg|thumb|200px|right|[[Ryan Farquhar]]'s 650&nbsp;cc [[Kawasaki Heavy Industries|Kawasaki]] at the start line of the 2012 Lightweight TT. He went on to win that year's race.]]A Production TT for roadster-based motorcycles having classes for maximum engine capacities of 250&nbsp;cc, 500&nbsp;cc and 750&nbsp;cc was introduced from [[1967 Isle of Man TT|1967]] until [[1976 Isle of Man TT|1976]] when the class was discontinued.

The Production TT was reintroduced for the 1984 races in three classes, reduced to two classes on safety grounds for the 1990 races. For the [[2005 Isle of Man TT|2005 races]] the Superstock class replaced the previous 1000&nbsp;cc and 600&nbsp;cc Production TT classes that had been part of the race schedule since 1989.