Just did a top end on a 2000 Xplorer 250. I premixed the first gallon so I could check the oil pump. At idle it fills the tube and drips very very slowly. When I rev it up and hold the lever open the oil runs out very slowly. I checked, and it does make pressure when I hold the lever up, but it doesn’t really seem to at idle. Do you guys think my pump is OK? Also, what years used the plastic pump gear? Thanks for your help, Dave