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 CR125R 1980-1981 CRF230F 2003-2016 NSR250 MC28 1994 SL230 1997 Kawasaki KLX250R 1997-1999 2001 KLX300 SM 2023 KLX300(R) 2023 KLX300R 2008 2020-2023 Suzuki DR250 1990 DR350SE 1998