This carburetor ( note it has some dirt please see pics) is off a 1981 yz 60 H frame number 4V0-003610 motor number 4V0-003610 This bike ran great but was not quite complete and to fast for my grandson so I decided to part it out. (will also fit other years and models I know some parts interchane with the yz 50) I have the most of this bike and will list it as time allows so if you don't see the part ask I may have it the part(s) in the picture is the part you will receive and we do our best to describe them accurately we test the parts when possible and throw away the junk we will add more parts often If there is a problem with one off our parts please contact us and we will try and make it right we strive for positive feedback and love to give the same thanks in advance for your business and may GOD richly bless you and yours