3RD PINION GEAR

1W1-17131-01-00 FITS: YZ100D - 1977 YZ100E - 1978 YZ100F - 1979 YZ100G - 1980 YZ100H - 1981 YZ125D - 1977 YZ125E - 1978 YZ125F - 1979 YZ125G - 1980