This is 2007 Harley Davidson Sportster. Suddenly Bike has lost 90% of power, Engine Backfires a lot and stalls when I push Throttle. I noticed that now Fuel pump keeps running.
Things I did try to fix the problem
1) REplaced Spark plugs
2) Removed tank, filled fresh gas. It was running good for a day after this solution. Next morning same problem.

I have uploaded video on youtube.

 

Nice 1st post = welcome!

 

Remove the air filter so you can see into the intake.
With a flashlight carefully inspect the butterfly shaft for cracks or breaks by holding the throttle open with the throttle twist grip so you get to see the back side where break usually occur.
Bob