MTX floating discs are made from two segments of stainless steel which are riveted together to allow the outer section of stainless steel to expand under extreme temperatures. The outer section is manufactured from Japanese SUS 420 stainless steel then heat-treated to HRC 36+-2 while the centre of the disc is manufactured from steel or alloy. Fits: Kawasaki NINJA 650R 2008-2013 NINJA 650R ABS 2013 Z1000 2007-2011 2013 Z1000 ABS 2010-2013 Z750R 2011-2012 ZX10R 2004-2007 ZX6R 2005-2011 ZX6RR 2005-2006