06 recon 250ES run problem
 

I have a 2006 Honda Recon 250ES that had sat for a year or more and decided it was time to get it running again. Brand new battery and took the carb off and sure enough all the needle valves plugged solid. Got all the junk cleaned out and it fired right up and idles great and revs up good in neutral. I put it in gear and it dies out when I hit the gas. Anyone have any ideas what could be wrong?
Mike