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: BETA RR200 2T RACING 2021 RR250 2T 2020-2021 RR300 2T 2013-2021 RR300 Racing 2T 2017-2021 Beta RR 2T 200 2023 RR 2T 250 2023 RR 2T 300 2023 Cagiva 125 PLANET 2000 Honda CR125R 2004-2007 CR250R 1987 1990-1991 CRF250R 2011-2021 CRF250RX 2019-2023 CRF250X 2004 2007-2010 CRF450R 2009-2016 Husqvarna TE250 2005-2009 KTM 200 EXC 2004-2007 400 EXC-RACING 2000 Suzuki RM250 1993 1996-1997 1999-2000 Yamaha YZ125 1993-1996 YZ250 1990-1992