If its not efi then the carbs probably aren't in sink with each other. Check the idle screw, see if they are turned out the same as each other. If one is out farther than the other it will let the slide go down farther and cut the air off. The carbs must be in perfect sink with each other or it will cause it to run funny and not idle well. Turn the idle screw in on the side that is idling and count how many turns you turn it in and then turn it back out to that. What ever that side was turn the other side in and turn it back out the same as what the side was that did idle. If that doesn't do it turn it in 1/8 or 1/4 turns in until it does idle smoothly. Try that. If that isn't it, you may have bad reeds.
Do a compression check to assure there are no problems there. Also pull youre choke plungers out and make sure there not all gummed up. If they are dirty the plungers will not seat properly.Also make sure they are adjusted correctly.
Pilot jet is plugged in one carb. Let the sled idle for a few secs and touch the exaust manafold (careful). the cold side is the side that is plugged. If it won't idle on one side but runs on that side after 1/4 throttle i am sure the pilot jet is your problem..
01 WAS THE FIRST YEAR OF POWER VALVES. THE ORIGIONAL OIL FROM THE FACTORY HAS A HISTORY OF CLOGGING THE POWER VALVES. THEY MAY BE STICKING. I WOULD TRY TO CLEAN THEM AND RUN A FULL SYNTHETIC OIL, SUCH AS TORCO OR AMSOIL AND SEE IF THAT CORRECTS THE PROBLEM. GOOD LUCK.
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