The Yamaha TDR 250 is a dual purpose motorcycle manufactured by Yamaha between 1988 and 1993. It is powered by a two-strokeparallel twin engine utilizing the Yamaha Power Valve System (YPVS). Designed to provide agile handling and quick acceleration for both on and off road use. It was the world's first two stroke to use a CDI ignition and digital advance system
The engine is essentially a Yamaha TZR250 unit with a modified power delivery to suit the TDR's intended use - many of the parts are interchangeable. It was originally released in a 250 cc format and a 240 cc format exclusively for the French market.