I have an issue with my Ultra. After the engine gets warmed up good its cuts out. I have changed the coil, the spark plug wires, and the iginition and Iam still having the same problem. I let the bike sit for 15-20 minutes at idle then get on it and go, after just a few miles the engine light will come on and it will lose power, almost like it is only running on one cylinder. Does anyone have any ideas?