I own a 2003 Sportster 1200. When I do a quick rev the engine pops out the carb. It does not matter if the engine is cold or not it still does it. It does not do it if I have the choke partially on. I did replace the spark plugs and removed the carb and cleaned it. Still the same problem. The bike has under 10,000 miles on it. What could the problem be?

Thanks

 

I have a 99xlh jets have been changed, plugs say everything is ok runs great. Still get carb farts. Only time I didn't is when I took a trip down south and ran real honest to goodness gas instead of the ethanol crap. My observation only and it farts now since all I have is 10% ethanol.