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: Suzuki GSX1300R HAYABUSA 1999-2007 GSX1400 2001-2008 GSXR1000 2001-2002 GSXR600 1997-2003 GSXR750 1996-2003 TL1000R 1998-2003 TL1000S 1997-2002