Pre-unit
Revision as of 17:02, 27 November 2010 by Addicted2speed (talk | contribs) (Created page with "An early motorcycle engine architecture where the engine and gearbox are built as independent casings, with their own oil reservoirs. (Compare unit construction). [[...")
An early motorcycle engine architecture where the engine and gearbox are built as independent casings, with their own oil reservoirs. (Compare unit construction).