DID Motocross Chain - Made in Japan Don't settle for anything less. Used by Ryan Villopoto to win 4 AMA SX titles All D.I.D 'ER' chains are designed exclusively for racing. 520ERT3 is used by the top factory SX and MX Teams to win races. 520MX chain has higher tensile strength for maximum performance and is ideal for muddy and sandy conditions. 520VT2 for offroad applications where a sealed chain is preferred, D.I.D's 520VT2 X-Ring chain provides excellent low friction high performance. D.I.D's exclusive SDH pin treatment is featured on the 520ERT2, 520 MX, 520DZ and all NZ Series chains. Fits: Gas-Gas MC 65 2023 GasGas MC65 2021 Honda CR80R 1986-1994 1996-2002 CR85R 2008 CR85R Small Wheel 2003-2007 CRF50F 2006 CRF80F 2004-2014 NBC110 2013-2017 2019-2020 Husqvarna TC 65 2023 TC65 2017-2021 2023 KTM 60 SX 1998-2002 65 SX 2001-2023 SX 65 2023 Kawasaki KX60 1986 2004 KX65 2010 Yamaha YZ65 2019-2021