JT Sprockets Steel Rear Sprocket Kawasaki KX 125 250 500 KXF 250 450 1980 - 2023 Suzuki RMZ 250 2004 - 2006, 49T

JT Sprockets is the world's leading manufacturer of aftermarket sprockets, constantly raising the industry's standards for quality and service. JT Steel Sprockets are manufactured using only the finest grade of C49 high carbon steel for the rear sprockets

http://www.jtsprockets.com/catalogue/part/JTR460SC/