missfire.

[Kiwimagic]

I have a 2009 XVS1100A. I have fitted Baron Nasty Boy Mufflers. Now I have a missfire . It only seems to happen under full throttle. It missfires briefly and then clears it self. At first I thought it was the rev limiter kicking in, but it seems to do it intermitantly no matter what revs im pulling. Its driving me crazy. Mostly in first gear from the lights. Grrrrr

I also fitted a Baron big air kit but bike shop removed this because the vaccum operated needles would not function properly, or so they told me.

[Freebird]

Have you re-jetted? You can typically change the mufflers without needing to re-jet but once you installed that big air kit, you changed the entire game. I'm almost 100% sure that if you want to run the big air kit and the free flowing mufflers, you are going to need to change those jets.

 

Oops...I read it again and see that you removed the air kit. Jetting is not likely your problem unless the air intake has been modified in some way or another. If you have done anything to increase the air flow, that is still the first place I would start. Also check to make sure that there were no leaks created when they re-installed the stock air box and filters.