My 2005 is the same ignition as your 04. #4 was where the Pro-Comm directions said to set it at. But it ran like crap. I just took a chance and tried #5. I also went back to stock NGK plugs! Like I said it runs better now than the bike has in 5 years. No more Decel popping, I actually miss that. Evryone knew it was me coming down the street when it popped. Now I'm in Stealth mode.
