When I frist put D&D's on my bike and was experimenting with different sized pilot jets, when I used too large of a pilot I had flames coming out of the pipes. Don't know if thats your problem, but it's not normal for flames to be coming out of the pipes....

"It's a hundred and six miles to Chicago, we've got a full tank of gas, half a pack of cigarettes, it's dark, and we're wearing sunglasses."