All XAM O-Ring chains are manufactured with hi-carbon alloy steel for strength and durability. XAM utilizes Nitrite Butadiene O-Rings to seal in lubrication and deliver smooth power with minimal ring drag or loss of horsepower. Chain length is 130 links. Fits: Honda XLR125 2002-2011 XR150L 2014-2021 Kawasaki KLX150L 2015-2019 Yamaha FZR250R 1989-1993 FZR400RR EXUP (3TJ IMPORT) 1993-1995 SR400 2013-2019