As part of their continuing quality improvement program the RK Chain Factory has made a running production upgrade to their bestselling XSO chain line. The XSO chains feature RK's proprietary RX-Ring seal design. Viewed in cross-section the RK RX-Ring has two contact lips and one lubrication pool versus the single seal point/pool design of a regular O-ring chain. RK's XSO chains offer quality performance and unbeatable value for all but the most demanding high-performance application. Tensile Strength: 7200 Nm Weight: 1.2 KG Max CC Rating: 400cc Street / 350cc Dirt Master Link Type: CLIP Chain Length: 130 Fits: Derbi GPR 125 4T 2009-2010 Honda XLR125 2002 Kawasaki KLX125 (A1-A3) Small Wheel 2003-2006 KLX125 (B1-B2) Big Wheel 2003-2006 Yamaha FZR400RR EXUP (3TJ IMPORT) 1993-1995 SR400 2013-2019 XT350 1985-1999