motorcycle chain & sprockets 1/1045 carbon steel 2/harden teeth 3/used for CBX250 TWISTER,XR250,AX-1 This 520-13T front sprocket ... /35T/36T/37T/38T/39T40T/41T/42T/43T…...56T etc.front sprocket12T/13T/14T/15T/16T/17T Chain 420,428,428H ... ,XRM,DT125,TS125,GP125,XLR,BZLP,HONDA155 SAMPLE PICTURES Package: Motorcycle front sprocket 520-13T