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 ATC200E 1982-1983 ATC200ES 1984-1986 ATC200M 1984-1985 ATC200S 1984-1986 ATC200X 1983-1987 ATC250R 1981-1986 CRF230L 2008-2015 TR200 1986-1987 TRX200 FOUR TRAX 1997 TRX200 FOURTRAX 1990-1996 TRX300EX SPORTRAX 2000-2008 TRX400EX 2WD SPORTRAX 2002-2007 TRX400X 2013-2014 Suzuki GN250 1986-2003 2005-2007 GZ250 Marauder 2002 LT80 QUADSPORT 2005-2006 Yamaha XT250 1995-2004 YFM125 GRIZZLY 2004-2006