I have a 2005 A/C 500 automatic with 150 miles on it. The last time I rode it a couple of weeks ago it ran fine. Now it starts fine, but when it warms up now it starts to cut out and die. It acts as if it's not getting enough fuel. I took the carb off and took the bowl off and inspected. It's clean as a whistle. Sometimes when it dies it backfires as well. What could have happened from one day to the next that could cause this?

 

<div class="FTQUOTE"><begin quote>Originally posted by: MM1

I have a 2005 A/C 500 automatic with 150 miles on it. The last time I rode it a couple of weeks ago it ran fine. Now it starts fine, but when it warms up now it starts to cut out and die. It acts as if it's not getting enough fuel. I took the carb off and took the bowl off and inspected. It's clean as a whistle. Sometimes when it dies it backfires as well. What could have happened from one day to the next that could cause this?</end quote></div>

It backfires because of a lean condition (running out of fuel)... You may want to check your gas tank vent to make sure it is not crimped or plugged. (causing a vacuum and not allowing the gas to flow from the gravity).

 

I had a similar issue with my 2006 AC 500! What i discovered was a small hole in the vaccum line that operates the fuel pump. This causes a very lean mixture and keeps the fuel pump from operating a maximum efficiency! Hope this helps!!!