Editing Flathead engine (section)

===Flathead motorcycles===
{{main|Flathead motorcycles}}

Flathead designs have been used on a number of early pre-war motorcycles, in particular US V-twins such as [[Harley-Davidson]] and [[Indian Motocycle Manufacturing Company|Indian]], some British singles, [[History of BMW motorcycles|BMW]] [[flat twin]]s and Russian copies thereof.<ref>For example, some Dnepr and Ural used flathead designs that BMW had licensed to the Soviets.</ref> The [[Cleveland Motorcycle Manufacturing Company]] produced a T-head four-cylinder in-line motorcycle engine in the 1920s.
<gallery>
Image:1915 Cadillac Model 51 V8 4stroke engine photo2.JPG|1915 Cadillac flathead engine block
Image:flathead.jpg|Harley-Davidson flathead
Image:Indian Chief Black Hawk 80 cubic inch 1950.jpg|Indian Chief Black Hawk
Image:BMW motorbike R 12 (aka).jpg|BMW R12
Image:Cleveland Model 4-45 1927.jpg|Cleveland Model 4-45
</gallery>