Game Changer: How Yamaha Killed 250 Two-Strokes, 21 years later

Husqvarna and KTM were racing big-bore four-strokes but it was the Yamaha YZ400M that ultimately changed the game and the sport of motocross and supercross we know of today. It was that day in Las Vegas when Doug Henry won aboard a four-stroke and a thump that was heard around the world of Moto.

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