I just installed the Screamin Eagle ll's on my 02 Fatboy! Man, the sound is superb and I definately got more on the ball on take off!!! I have the fuel injected model... Hope this helps... took an 1.5 hours to do the job and I put the heat shields from the shotgun pipes onto the Eagles too! Bueno, Dan NM
I put a set of V&H straight shots on my 2000 Fat Boy with in a week of buying it. Made a big difference in performance anf the bike ran just great. After several more months, I was waiting for summer, I installed a Thunderslide kit and Hypercharger. Again, big difference in performance. What you really need to be concerned with is engine temp when running lean, which it will be with the mufflers and not re-jetting. I bought an HD oil dipstick with the temperature measurement on top. Bike was fine till the weather turned hot. As I said above I was waiting for summer, the reason is that you should jet your bike for the weather you ride in the most. Living here in the deep south that's 90 degree heat and very high humidity. The bike is a little lean in winter because of the summer setup but the oil temperature and spark plugs indicate that it is running just great, albeit a little lean. I hope this helps.
From what I've read, changing your pipes results in a change in backpressure, thus necessitating adjustment. For caburated Harleys, the solution is rejetting, for fuel injected bikes the ECM (electronic control module) needs to be recalibrated.
I thought I remember reading that the "new" EFI on the 01 and later softails will adjust itself slightly to minor changes, like slip-on's or pipes. The technical breakdown of what I read was the system was supposed to be "smart" and would adjust to a limited number of modifications. Does anyone else remember reading about this ?
I didn't have any adjustments done after installing the SE ll's (fuel injection) The bike runs smoothly and the sound is just what I was looking for! Low rumble and not real loud... I love em and a breeze to instal too! I put the original heat shields on the new pipes too! buena suerte, DAn NM
Just met a guy here in Espanola with an 01 Heritage with the Screamin Eagle 1's. He owns a little grocery store here in town that I stop at. He loved the sound of my SE II's and is going to change his now too! They sound better and better by the mile! bueno, Dan NM