... your drawings or the samples. Material SAE1045, cast iron and stainless steel etc.the main specification of motorcycle sprocket: ... 520,428H, 525, 530 etcMaterial:1045 steel, 1023 steel and 16MnSurface-finishing:Sandblasting, Dull polish, Galvanized, with the ... 9001 Quality system certificate.We can offer: OEM Service Offered Design Service Offered Buyer Label Offered Motorcycle rear and front sprocket