DID - 520 ERVT Chain New upgrade to the DID 520VT2 Chain New 520 ERVT breaks down the concept of the original motocross chain (non-O-Ring) and adds the benefits of an x-ring More lightweight and longer chain life By adjusting the materials, the 520ERVT is now 2% lighter and has a 15% longer lifespan, all while maintaining the tensile strength The clear choice of Top AMA teams. AMA riders rely on the 520 ERVT to achieve their success! Compare:Pin Length: 18.7mm (both 520ERVT & 520VT2)Roller Diameter: 10.16mm(both 520ERVT &520VT2)Plate Thickness Inner: 1.8(520ERVT), 2.0 ((520VT2)Plate Thickness Outer: 2.0(both 520ERVT &520VT2)Weight: 1.46kg(520ERVT), 1.49kg(520VT2)Tensile Strength: 37.5KN(both 520ERVT &520VT2)Seal Type: X-Ring(both 520ERVT &520VT2)Wear Resist: 3.500(520ERVT), 3.060(520VT2)Connecting Link: Rivet optional, Press & Clip included(both 520ERVT &520VT2) Fits: BETA RR250 2T 2013-2019 RR250 Racing 2T 2017-2019 Beta RR 4T 480 2023 Cagiva Raptor 125 2007 Honda CR125R 2004-2007 CR250R 1987 CR500R 1986-1987 CRF250R 2011-2020 CRF250RX 2019-2021 CRF450R 2009-2016 Husqvarna TC510 2007-2009 TE510 2005-2009 KTM 400 EXC-RACING 2000 Suzuki RM250 1999-2000 Yamaha YZ125 1993-1996 YZ250 1990-1992 YZ450F 2019-2021