Having trouble with 2002 Roadking Classic. Bike is fuel injected and nothing upgraded to the engine. Engine seems to miss or "hiccup" in usually low rpm and started around 13,000 miles and getting worse. Have changed the plugs and air filter (plugs look good). Also put some dry gas in tank and nothing seems to help. Next step will try plug wires. Have seen on forum before that the problem could be internal fuel lines, but does this with almost full tank. Also seen riders changing injectors from 8% to 25%, but can't figure out why this would start at 13,000 miles?

 

Its very possible for the fuel line to have a pin hole....have them changed out. As far as a full tank of gas has nothing to do with the pressure in the lines....it's not gravity feed....the line has 62 lbs of pressure so a hole in the line would rob the injector of the pressure it needs to operate correctly.