While you have it apart, check the overflow tube in the float bowl. You could have a split in that tube. I ran into it on a Honda motorcycle engine. Latebird can replace the tube if you need to. To check it, fill the float bowl with water and plug the top of the tube with your finger. Blow air into the overflow on the bottom of the carb. If you get bubbles in the water then the tube is bad.
Mine: 2018 Sportsman 850SP - 26" Bear Claw HTRs on OEM steel wheels(I really don't like the Aluminum ones)
Polaris Hand warmers, Mirrors.
Hers: 2007 Sportsman 500 EFI, Polaris Winch, 26" Bear Claw HTRs on Moose 427x Wheels. QSC Clutch Kit, Hand Warmers
2001 Magnum 325 MOSE 12" rear wheel conversion. 25" Sedona Coyote tires
2001 Magnum 325 Warn winch and Moose 60" plow
2017 Polaris Ranger 1000XP - Roof and front glass
SOLD 2004 Sportsman 600 Twin