MTX solid discs are constructed using one complete segment of Japanese SUS 420 stainless steel then heat-treated to HRC 36+-2. Lightening and drill hole patterns are as per OEM designs to improve braking performance and reduce the temperature of the disc.MTX Discs provide amazing braking control for your motorcycle. All MTX discs are designed and manufactured with world-leading cutting edge technologies:Precision CNC machined and laser-cut technologyJapanese SUS 420 Stainless SteelReplacement for Original EquipmentOEM Design; lightening & drill hole patternsSpecifications:O.D: 267mmI.D: 118mmMinimum Thickness: 3.6mmDisc Position: Front Left Fits: Yamaha TT600E BELGARDA E/START 1996-1998 TT600R 1997-2004 TT600S BELGARDA K/START 1995-1998