ALL BALLS 79-5003 CHAIN ROLLER BLACK KTM SX F 125 250 360 380 400 450 525 U/L You are purchasing: All Balls KTM Chain Roller - Black (79-5003) Suits: KTM (Upper / Lower) 125 SX Years 1993-2005 250 SX Years 1994-2002 360 SX Years 1996-1997 380 SX Years 1998-2001 400 SX Years 1998-2002 520 SX Years 2000-2002 (Upper only) 125 SX Years 2006-2007 250 SX 2T Years 2003-2007 250 SX-F 4T Years 2005-2007 450 SX Years 2003-2006 450 SX-F Years 2007 525 SX Years 2003-2006 Specifications: Designed as a direct replacement for the OEM design. 34mm and 38mm rollers feature an outer mechanical seal to protect the bearings from dirt and water and include mounting hardware.