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