97 sportsman 500 carb problems
What do you have the fuel screw set at? Seems like you are getting to much fuel. Try turning it all the way in. Then back out 1 1/2 turn, to start. When you say it runs better without the air filter on, does it rev up properly? And does it bogg down around half throttle with air filter on? If so do you have a precleaner in the inlet of your air box? If not, with it running, grab your rubber intake boot on the air box and squeeze it closed about half way and then hit the throttle. Give it a try.