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We have a 2wd Bear Tracker that was flooded out by a tornado and I've since been trying to get it right. I've cleared the water out of the tank and now has fresh fuel, and I've opened the carb so many times I could do it blind folded under 10min. She'll fire up as soon as you turn the key and hit the button, even on a cold start, and idles perfectly. But the second you hit the gas it bogs down and dies. I had it running GREAT for about 10-15min once and suddenly ran like shit and limped it back to the house. I've barely got it to move under its own power since. I'm at a loss at this point. Does ANYONE know of something stupid I could've missed? The carb does have a fresh rebuilt kit that I put on about a month before the flood. It was not started until it dried, I cleared the tank and opened the carb the first time. I guess I'm just gonna pull the entire thing apart again and go from there. Maybe another rebuild kit? I'm gonna swear this thing is clean though. 

Thanks for any ideas

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Quite possibly some water  laying in the  bottom  of the float bowl  again..  Some  carbs have a bowl  drain  so  you  don't  need to remove the  whole carb to  drain it  out.  Very  possible  there  was  a  little  water left  after the  carb and tank  cleaning ....  or a little  bit  of rust/   crap   came  loose from  somewhere  and is  blocking  a  jet..  I'd  pull  the  carb  and    give it  another  blowing  out and  check   jests and  passages .  No  need for a  new  kit . .... just  pull,  clean  and  it'll  likely  be  fine .  If  you  don't  have  air  available to  blow  out  the  carb  passages, the "canned air"   used  for  computer  cleaning  works  well.

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Is the air filter clogged? Sometimes the jets need to be cleaned with a very small wire because the dirt or grime won't come off with the air compressor. 

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Topic moved to Yamaha ATV forum and added make of ATV to topic title.

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