Sounds to me like its running on one cylinder, I had a plug wire go bad and mine didnt have any power, take the wires off and put a plug in them and ground it and see if there is spark.

 

If possible get the plugs out and see if one is wet or black, if so the ignition is probably the problem. If they look the same, the carb is suspect.

As others have stated, if in doubt service the carb, 99% of the time one of the jets is plugged. A low mileage machine is particularly suspect for this, or bad fuel/water.

 

Check your belt and clutches, vibration may be from smoked belt and no power may have something to do with your clutches, maybe the driven bushings are shot? Hope this helps.

 

well if its running on 1 cyclinder, then only one side on the pipes/cyclinder will be hot then. pull the plug wires off one at a time and try to run it. if it runs the same when one is un plugged then its that side.

 

that is a good idea

 

just my two cents but I'v herd of sportsmans running ruff because of broken motor mounts.another thing is from reading, people taken there plastics of there wheelers and pinching there gas vint line that runs up over there gas tank when they replace the plastic.

 

I had this exact samae problem on my 2003 700. I did the same things you did. Out of frustration I called the polaris dealer and found out that there was an update for my 700 and they thought it would take care of it. The update was the breather hose from the rocker cover on the head to the air box. The old breather hose had a white type of cylinder on it that seemed to be slightly plugged up. After putting the new hose on the problem continued. I had to remove the cover from the head and it was plugged on the inside where the hose connected. I cleaned it up and the problem was gone. The missing you are having is from pressure build up. My 700 would not go over 3000 - 4000 rpm also. I hope this helps.

 

good info bob, and welcome to the forum and thanks for sharing your experince.

 

gad! dayum! man that sux! i would take it back to dealer an say WTF.. HOPE YA GET IT FIXED RIGHT...GOOD LUCK