2011 YAMAHA YZF-R6, TRACK READY, STREET SMART The R6 is designed to do one thing extremely well: get around a race track in minimal time. It⿿s about a screaming, 15,000-rpm-plus fuel-injected four-cylinder engine in a taut chassis that lets it snap from upright to full lean instantly. Oh Yeah: It⿿s a great street bike too.