Yamaha’s YZ250 two-stroke motocrosser remains a core favorite, and a venerated icon of the past with a modern lightweight chassis and simple yet potent engine.

Yamaha points to "the push for more environmentally friendly machines" as the impetus for 4-stroke dirt bikes — which sounds like a familiar argument for electric vehicles vs. gas engines in ...

2003 Yamaha WR45QF featuring 449cc, DOHC, liquid-cooled, four-stroke with titanium valves and electric start, front 46mm Kayaba inverted telescopic fork, front 250mm full floating disc, and only ...

2013 Yamaha YZ250, the 2-stroke Dirt Racer. Published: 6 Nov 2012, 11:54 UTC • By: Florin Tibu. 8 photos. Photo: Yamaha. ... These are the prerequisites for a dirt racing bike, ...