AS3 Performance Chain Guide to fit Yamaha YZ 125 250, YZ 250 450 F, WR 250 450 F. AS3 PERFORMANCE CHAIN GUIDE BLUE to fit YAMAHA YZ YZF WRF 125 250 450 2007-2020. They are manufactured from strong and hard wearing TPU plastic and are designed to be installed inside the OEM aluminium chain guide.
