1999-2008 Honda Sportrax 400EX TRX400EX Non O-Ring Yellow Chain 520-94L 94L Yellow Non O Ring Chain Race-Driven Non-O-Ring Chain's tensile strength = 7600+ lbs. All chains include masterlink. Non-O-Ring chain doesn't have o-rings between the links so it is lighter, thinner and has less drag. Fits 1999-2008 Fits Honda TRX400EX TRX 400EX