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 RR400 4T 2010-2014 Beta RR 4T 350 2023 Cagiva 125 MITO 2 SPORTS 1996 GasGas EC125 2012-2014 EC200 2010 2013-2015 EC300 2001-2017 Honda CR125R 1987-1994 CR250R 1986 1988-1989 1992-1994 2000 CRF250R 2004-2010 CRF250X 2005-2006 CRF450R 2002-2008 CRF450X 2005-2017 XRB200 1993-2001 Husqvarna TE310 2009-2014 WR125 2009-2012 WR250 2005-2009 Suzuki RM125 1992-2000 RM250 1998 RMX250 1989 1991 1994-2000 RMX450Z 2009-2015 VL250 INTRUDER 2002-2013 Yamaha WR250F 2001-2021 WR426F 2001-2002 WR450F 2003-2021 YFM90R RAPTOR 2009-2021 YZ250 1997-1998 2000-2016 YZ250F 2010-2021 YZ250FX 2015-2016 YZ400F 1998-1999 YZ426F 2000-2002 YZ450F 2003-2017 YZ450FX 2016