Hard to find part. Most serious off road guys threw them away so they didn't pack mud into the counter sprocket. Gorgeous High Chrome unit that will fit either listed model. Used in TS250 1971-1974 model code 300. RL250 1974-1975, May also fit a TM250 same years, but they were painted black. Mounting holes are 10.27CM on center. Minor corrosion on its top surface shown on the picture.