hat was the issue that caused all the changes? Is your carb one of the cheap Chinese knock offs? If it is then look there first. Too often on the forum we see that "fit" your machine doesn't always mean it will work properly with your machine. It might not be jetted right for your location or the needle jet could be the wrong style.
I find that rebuilding the OEM carb gives me much better results.
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