Front, left. Six-time world champion, the SK discs use the WAVE technology, providing them a unbeatable weight. The SK discs are the most recommended in the racing industry. Outer and inner diameter of the disk have a non-round design that enables better radial expansion of the rotor under extreme heat conditions. Moreover piercing holes are replaced by edges specifically designed to grow brake pad regeneration process. Features: Auto-ventilated and perfect and perfect efficiency at high temperatures. Extremely slight. Improved feel. More braking grip. For Yamaha YZF R6 (2005-2012), Fazer 800 (2010-2012), FZ8 (2010-2013), YZF R1 (2007-2011), XTZ Super Tenere 1200 (2010-2013).