Rear Sprocket, 520 Size, 51T, Gold, YZ125/YZ250/YZ426/YZ450F/WR250R/WR250X/WR250/WR400F

[TALON TR339R/L Rear Sprocket, 520 Size, 51T, Gold for YZ125/YZ250/YZ426/YZ450F/WR250R/WR250X/WR250/WR400F, WESTWOOD] ・Made of 7075 T6 aluminum, known for its lightweight and superior rigidity, also used in aircraft. ・Designed and developed to improve the machine's overall balance by reducing unsprung weight, thereby smoothing the action of the rear shock. Additionally, it features self-cleaning grooved (recessed) processing to reduce resistance caused by mud and gravel between the chain and sprocket. ・It is recommended to replace the chain and sprockets simultaneously as a set of three! If the chain is stretched, simply replacing the sprocket alone will cause the new sprocket to wear unevenly to match the stretched chain's link pitch, not only preventing it from performing as intended but also shortening its replacement cycle. Compatible models/years: YAMAHA YZ125/'99-'09, YZ250/'99-'09, YZ426/'99-'09, YZ450F/'99-'09, WR250R/'08-'09, WR250X/'08-'09, WR250/'99-'07, WR400F/'99-'07. Type: Rear Size: 520 Available Teeth: 51 Color: Gold *Images are for illustration purposes only. The design and specifications of the products shown are subject to change without notice. Please be aware of this.