2015 Yamaha YZF-R6 The Reigning 600cc Champion The reigning two-straight Champ R6 is quite simply the best 600cc sportbike around. Features may include: Light, powerful, and bristling with knowledge gained from years of racing, the YZF-R6 is the most advanced production 600cc motorcycle Yamaha—or anybody else—has ever built. The YZF-R6 was the fir...