I recently purchased a 2000 Kodiak 400. I took the carburetor apart, cleaned it well, and installed new jets, float valve and pilot set screw. It idles fine but bogs down when I throttle it. However when I throttle it and cover the air intake almost completely it runs great which tells me it's running lean without me covering the intake. I set the pilot screw to 2 3/4 turns off from bottom. I think I installed the diaphragm/slide/needle set correctly but not sure. I tried setting the retainer clip at the top of the needle grooves, the bottom of the needle grooves, and the middle...same result. I have the same problem whether the air filter (K&N) is on or off. Anyone had a similar problem or know what I can try next.