... factory start from industrial steel forging and has 27 years' manufacture experience Motorcycle sprocket chain wheel feature:1\high ... Heat treatmentHigh frequency quenching,heat-treated by mesh belt furnace and carburizingSurface finishingPlate zinc, nickel plate, chromeplate,Sandblasting, Dull ... RS100,XRM,DT125,TS125,GP125,XLR,BZLP,HONDA155 Motorcycle sprockets and chain wheel gear teeth hardened