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: Honda CRF110F 2013-2022 CRF50F 2004-2023 CRF70F 2004-2012 MSX125 Grom 2014-2021 XR70R 1997-2003 Kawasaki KLX110L 2023 Yamaha TTR110 E 2010