The last time Yamaha raced a V4 engine in grand prix was the YZR500 two-stroke, before switching to the same Inline format as its production Superbikes for the start of the four-stroke MotoGP era.

I am from Austria. I have built a replica of Norick Abe´s 1999 YZR500 based on a Yamaha RD500 engine. Modifications and one-off parts are a long list, it took me six years to complete the bike.

Smith will ride the YZR-500 ROC Yamaha at the Bikers’s Classic event ... there haven’t been many possibilities for him to ride two stroke engines, so I trust that bike is legendary to him ...

Yamaha's YZR-M1 broke cover in ... the YZR-M1 utilises a chassis closely related to the YZR500. And the choice of an in-line four-cylinder engine was made specifically to complement the chassis.

Japanese manufacturer Yamaha, one of the most successful constructors ... The XSR900 GP takes its design cues from the YZR500, which was ridden to victory in the '80s and '90s.

Yamaha’s tossing a few more chips in the proverbial pot than ... Apparently, the Achilles heel of the Monster Energy team’s YZR-M1 is the engine – a 1000cc, Liquid-cooled, inline four-cylinder heart ...

Honda and Yamaha’s battle had waged for years both on and off the track. With the 2002 rule changes and the introduction of the MotoGP™ class, the four stroke engines presented their rivalry ...