I went for a ride yesterday and my bike was fine, then all of a sudden when I hit 9000 rpm it would backfire like a machine gun and flames would shoot out with some smoke as well. It kept backfiring until I let of the throttle, there was also be no acceleration either. The bike continued to run fine as long as I didn't push it to 9000 rpm. This morning I went to ride the bike to the shop and it completely stopped working. I got about a km or so from my house and all of the power shut of and I could not get it started again.
I had taken my bike to the shop about 10 days ago, they did a full tune up and valve adjustment. Could they have done something wrong? By the way my bike is carborated if that helps. Any suggestions on what might be the problem?