It should rev up higher as you are making it richer. Make sure the air filter is clean, they wont run with dirty filters at all those two strokers. Make sure your battery is good. If it isnt then the stator is basically running the bike but you wont have any reserve to restart it after you turn it off.
I think you need to pull apart your carb and do a thorough cleaning. My 500Ho did the same thing and it turned out that the needle get was warn and the c clip was all wobbly.
I dont think that is the same carb you have but you will have a needle jet.
12 Starfire Blue Sportsman 850XPHO LE EPS:
- Fender guards, 3500lb PolarisHD winch, Polaris hand warmers, Powermadd hand guards, HID lights, Guru Front Guard, Ricochet A-Arm guards, front L&R box, Uni Air Filter. 27" Black Diamonds, Odyssey Battery, Rhino front axles, QSC clutch kit
12 Bronze Mist Sportsman 850XPHO EPS
- 3500lb PolarisHD winch, Polaris hand warmers, Powermadd Hand guards, HID lights, Guru Front Guard, Ricochet A-Arm guards, Front L&R box, Uni Air Filter. 27" Black Diamonds, Odyssey Battery, Rhino front axles
08 Sportsman 500HO
-26" STI Black Diamond, Kimpex box with seat, Rack/Fender guards, Uni Air Filter, HID lights, Ricochet A-Arm guards, Polaris 3500HD, Polaris hand/thumb warmers, EPI clutch, Rhino front axles
01 500HO Plow Machine
-Kenda Bearclaws, Kimpex Plow, hand warmers, Warn winch
Faithful friends no longer with me:
94 Sportsman 400 4x4- owned 18 years
2000 Xplorer 400 4x4- owned 10 years