MagicPaddler

If it is jet size it will run good on warm humid days and bad on cold days.

cheap replacement and it ran just like the original oem 
 

I have one that did almost the same thing. I noticed that it ran better in warm weather and really bad it cold weather.  It ran better with the choke on part way.  If I could get it running fast it ran better.  I replaced the pilot jet with one 3 sizes bigger. If it is affected by temperature it is most likely fuel related and most common is too small a jet. I also bought a new carb.  ended up with the old carb and bigger jet.

I have to laugh while reader this because I have been there.  I put 2 sizes bigger piolet jets in and it works fine. Any one want to buy my new carburetor with less than 5 minutes running time on it. Probably needs a bigger main jet also because my 700 tops out at about 50.

By reading earlier pages in this thread I was able to download a service manual that covers my 2003 sportsman. It was a link supplied by oxidized_black that provided the manual I was looking for.

Thank you