Just got my 04 running and went out for a shakedown run. Sled stopped running. Brought it home and theres no spark. Begin diagnosing and find that if only one plug wire is on a plug i have no spark, but if both are plugged in I have spark. Not sure what could be causing this. Thinking maybe a coil.

exactly the same thing happened to mine. bum a coil off anyone that has a liberty liquid cooled motor and test it to see if its the coil. if it is get a new one. worked on the first pull with mine..