Ok Wolf. Instead of tapping or removing exhaust to drain it, my super-size friend and I stood it on end hoping that something might drain out through the exhaust & muffler. Nothing came out but now it has some of its 'pop' back. Weird. Now when I hold the throttle wide open it itermitantly revs with full power and sometimes its still sluggish. When I drive it, it will sometimes slowly rev then snap full power and sometime it won't. But it is better than the last few days just still not completely responsive all the time. Whatcha think?  

yes you are supposed to allow more air into the mix for higher altitudes.

it could be that it is getting more fuel than it needs.  

WOW sounds like you have some serious oil overload in the head from the overfill.

did you turn it over while the exhaust was loose from the cylinder?

if not then take the exhaust loose, move it from it's mount a few inches so the outlet on the cylinder is clear a bit, and turn it over.  see what comes out.

if possible crank it up and run it a second to blow some of this out.

i warn you it will be loud though.

if nothing comes out repeat what your friend did but hold it a little longer so it can drain back.  remember oil is thick and doesn't drain as quickly as fuel or water.
but be careful not to stand it up too straight or turn the atv upside down this will make the situation worse.  

if there is no change from this then ride it a little while see if it cleans itself out.
if not then we can look at readjusting the fuel/air mixture for the larger jet.

the problem is that the overload in oil that we now know was at least part of the problem, mimics the same issues caused by too much fuel.

when you are getting too much fuel the engine bogs down and you lose power on top end.

but now that we have some of the oil overfill issue straightened out we need to make sure all of the oil overload is remedied, and see if the larger jet is large enough to cause a problem.  

I put the old main jet back in and it still runs the same. It's slowly getting better (it seems to be independent of jet change) and when I start it for the fist time of the day it smokes like a bad mother.  

Ooops, misspelled. Not FIST time..."FIRST time of the day". Also, it almost acts like the throttle is sticking...sometime opening all the way...sometimes sticking? I hate when my stuff does'nt work proper! Thanks Wolf.  

Here's the latest...when I give it throttle it hesitates for awhile then goes to full RPM's. When I let off the throttle and let it idle for a while and then go back to full throttle it does this same thing. But, when it reaches full RPM's, and then I rev it up and down without letting it go to idle, it remains with the full powerband (if that makes any sense).  

yes it makes sense, you stillhave some oil overload, ride it for a bit and see if it doesn't clear up even more.

basically when you first start it all the oil overload has drained back around the valve. it burns it out and runs better.

try the thing you did with your buddy again, see if it doesn't straighten out even more.

and check the exhaust pipe for oil.  

Well, I just started running like crap again and I didn't do anything, so I lifted it again (nothing drained) tried several various carb adjustments and it just runs like crap. No more is it running good every now and then. Its now kinda skipping (misfire?) and no more full RPM's!!! I still need to remove the exhaust, which I'll do tomorrow, to eliminate the oil in the head theory although don't you think it would have blown out by now? I've put over 10 miles on it while testing it.  

it should have blown it out by now.

have you changed the spark plug since getting it to run better? and yank the carb, i'd just about bet it needs a good cleaning again.  

Checked and changed plug. Getting black quick...not wet until this last time...black and a little oily after just a mile or so. OK, I'll take the carb apart again. I did notice little black pieces half moon shaped crud in the carb the last time I took it apart (I've taken it apart 4 times now) but I did'nt pull the needle assembly under the float. I'll do that tomorrow. Thanks again for walking me through this Wolf    

hey just thought i'd let you know there's a picture of the new 2009 polaris atv under my rides.

go check it out.  

What the heck is going on??!!! I cleaned the carb again and it still ran the same but this time after no more than two minutes of running the throttle up and down, I shut it off and noticed the exhaust pipe was glowing red hot where it attaches to the head. What the heck does that mean???  

clogged!!!
my man you have oil overload in the exhaust is all i can think. or you had deposited into the exhaust enough oil when you overfilled it so that it has created a clog.

remove the exhaust from the cylinder, crank the engine it should run better. although run loudly with the exhaust disconnected.

you can try taking the baffle out of the muffler and see if it doesn't blow some of it out.
but you do have a clogged exhaust.

try draining the exhaust pipe as you said before, you may have to replace the muffler as well.

either the muffler isn't allowing enough flow due to it being saturated by oil,(it can have excess oil going through it and clogg the inside of the muffler, mufflers have baffles and collectors meaning oil can collect in there as well.)

or the exhaust pipe is full of oil itself.

it makes sense too being that you and your friend raised the atv off the ground so that the oil wasn't a deep puddle in the exhaust but was distributed along the pipe. (it ran down the inside of the pipe and had to recollect later, so it ran a little better for a while.

case in point:
just like cars if the exhaust starts to clog and cannot allow enough exhaust gases to flow out, then the exhaust heats up causing the pipes to glow red.

I have had this happen before. although mainly with 2 cycle engines where the fiberglass batting inside the muffler was dampened with oil so the exhaust gases couldn't flow freely. or with automobiles where the catalytic convertor clogged up and would get so hot it would set the grass on fire underneath it.  

OK, I'll remove the exhaust tomorrow. Would it get red hot if the fuel mixture is too rich? Also, I looked for the Polaris but could'nt find it. I just saw your screaming Blaster and the other quad you got. Hope you weren't affected by the twisters the other day!