Thumper
Revision as of 15:44, 28 November 2010 by Addicted2speed (talk | contribs) (Created page with "A single-cylinder, four-stroke motorcycle engine. Can also refer to a motorbike that has this kind of engine. Category:Definitions Category:Slang")
A single-cylinder, four-stroke motorcycle engine. Can also refer to a motorbike that has this kind of engine.