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 RR350 4T 2012-2019 RR350 4T EFI 2020-2021 RR350 Racing 4T 2020-2021 RR390 4T 2015-2019 RR390 4T EFI 2020-2021 RR390 RACING 4T EFI 2021 RR400 4T 2010-2014 RR430 4T 2015-2019 RR430 4T EFI 2020 RR430 Racing 4T 2017-2018 RR450 4T 2010-2014 BMW G450X 2009-2011 Beta RR 4T 350 2023 RR 4T 390 2023 RR 4T 430 2023 GasGas EC125 2012-2014 EC200 2010 2013-2015 EC300 2001-2017 Honda CR125R 1995-2003 CR250R 1986 1988-1989 1992-2007 CRF250R 2004-2010 CRF250X 2005-2006 CRF450R 2002-2008 CRF450X 2005-2017 Husqvarna TE310 2009-2014 WR125 2009-2012 WR250 2005-2009 Kawasaki KX450F 2023 Suzuki GSX250 INVADER 2002-2004 RM125 1992-2000 RM250 1998 RMX250 1989 1991 1994-2000 RMX450Z 2009-2015 Yamaha WR250F 2001-2021 WR426F 2001-2002 WR450F 2003-2021 YZ250 1994-2016 YZ250F 2010-2021 YZ250FX 2015-2016 YZ400F 1998-1999 YZ426F 2000-2002 YZ450F 2003-2018 YZ450FX 2016