i tore my carb apart early last week. i had all the jets soaking then got busy with other things. anyways i put it back together today and i have a part left over. it is a white plastic piece. it looks like it should go over the main and pilot jets, but i couldnt figure it out.i forget. any help please. i gotta get this thing back together asap. i have an indoor race this weekend comming up.