... motorcycle sprocket & chain: 428H chain; 1045 steel and harden teeth; various surface coating and color select; precise size Motorcycle sprocket chain wheel ... Heat treatmentHigh frequency quenching,heat-treated by mesh belt furnace and carburizingSurface finishingPlate zinc, nickel plate, chromeplate,Sandblasting, Dull polish ... ,DT125,TS125,GP125,XLR,BZLP,HONDA155 Motorcycle sprockets and chains set