520 13T 50T Motorcycle Front Rear Sprocket for Yamaha WR450 F-W F-Z F-L YZ450 WR 450

High-concerned chemical：None Item Weight：1.2kg External Testing Certification：iso9001 Model Name：For Yamaha YZ 450 Brand Name：BLDR Origin：Mainland China Item Type：Chain Sets Material：carburized steel

High-concerned chemical: None Item Weight: 1.2kg External Testing Certification: iso9001 Model Name: For Yamaha YZ 450 Brand Name: BLDR Origin: Mainland China Item Type: Chain Sets Material: carburized steel