Editing Isle of Man TT (section)

====Sidecar TT====
{{main|Sidecar TT}}

[[File:2013 Isle of Man TT 14.jpg|thumb|200px|left|Sidecar TT race competitors line up to start the race]]
The [[1923 Isle of Man TT|1923 TT]] was the first time the Sidecar TT race was run, over three laps ({{convert|113|mi|disp=or|abbr=on}}) of the [[Snaefell Mountain Course|Mountain Course]] and was won by [[Freddie Dixon]] and passenger Walter Denny with a [[Douglas (motorcycles)|Douglas]] and special ''banking-sidecar'' at an average race speed of {{convert|53.15|mph|abbr=on}}. For the [[1926 Isle of Man TT|1926 event]] the Sidecar and [[Ultra-Lightweight TT]] classes were dropped due to lack of entries.

The Sidecar race was re-introduced from the [[1954 Isle of Man TT|1954 event]] for Sidecars not exceeding 500&nbsp;cc engine capacity, run on the [[Clypse Course]]. A non-championship 750&nbsp;cc class for sidecars was introduced at the [[1968 Isle of Man TT|1968 event]]. For the [[1976 Isle of Man TT|1976 event]] the race was held over two-legs. From 1975, the previous 500&nbsp;cc and 750&nbsp;cc classes for Sidecars were replaced by a 1000&nbsp;cc engine capacity class.

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The new [[Fédération Internationale de Motocyclisme|FIM]] Formula 2 class for Sidecars was introduced for the 1990 Isle of Man TT.

* 1954–1959 FIM World Championship Event for Side-Cars not exceeding 500&nbsp;cc engine capacity. Race held on the [[Clypse Course]].
* 1960–1976 FIM World Championship Event held on [[Snaefell mountain course|Mountain Course]].
* 1968–1974 Non-Championship event for Sidecars not exceeding 750&nbsp;cc.
* 1975–1989 Sidecars not exceeding 1000&nbsp;cc engine capacity.
* 1990– FIM Formula 2 Sidecar race for two-stroke engines not exceeding 350&nbsp;cc or four-stroke engines not exceeding 600&nbsp;cc.

The 2015 specifications for entries into the Sidecar TT race are:
* Machines must comply with general technical rules as per ACU Standing Regulations and 2015 Isle of Man TT regulations.
** Engine Types
***501 – 600&nbsp;cc, 4 stroke, 4 cylinder, Production based motorcycle engines.