Sprocket details:
13 Tooth
Fits 17mm shaft
Chain Size: #420
Gearing: 13/36
Every sprocket meets or exceeds the highest possible quality standards
Sprockets are heat-treated and bead-blasted to reduce material surface tension
Front sprockets are made with top-quality Japanese C45 high carbon steel and SCM415 chromoly steel alloy
Known to fit Honda 1973 ATC70, 1978-1985 ATC70, 2004-2009 CRF80F, 1986-1987 TRX70 FourTrax, 1977-1979 XL75, 1973-1975 XR75K, 1979-1984 XR80, 1985-2003 XR80R, 1969-1971 Z50AK Mini Trail, 1974 Z50Ak Mini Trail, 1979-1989 Z50R, 1991-1999 Z50R, 1986 Z50RD and of course Chinese clones.