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: Yamaha MT09 2014-2022 MT09 TRACER 2016 2019-2021 MXT850 Niken 2019-2021 MXT850 Niken GT 2020-2022 XSR900 2017-2018 YZF R3 2015-2021