I am currently running the old style Screamin Eagle slip on mufflers [2005].There getting to be to loud ,was wondering if i put the stock mufflers on would this lean it out?I have the Stage 1 aircleaner and download,ANY HELP WOULD BE APPRECIATEDthanks

 

You probably need to have it re-tuned if you put the stock muffler back on.

 

If anything, I would think they would make it run a bit rich. More back pressure to hold the fuel/air mix "in."

Can those pipe baffles come out? Might pick-up the muffler packing from Fuel Moto if they do and re-pack the SE's.

 

It shouldn't make it more lean. It's possible that your bike will run fine as the download doesn't richen the mixture up that much anyway.

 

There the old one piece pipes not repackable

 

Yep, mite make it a little rich & if you have a tuner it can be self-adjusted to allow for the exhaust change.

 

I had the stage 1 A/C and fuel management done on my '07 with the stock mufflers it kept giving an error code on the O2 sensors. I put on a set of Rush 1.75 mufflers and no more error codes. The shop said it could have been to much restriction in the stock ones holding the gases in the pipes causing the error codes.

 

Screamin Eagles too loud?
They are kind of tinney sounding.
Those "Peacemaker" mufflers (VH I think?)
have a nice "deep" tone. They're pretty quiet (too
quite for me- bit I think a Thunderheader is barely
loud enough)

Stock mufflers suck!! They're just on there to pass
DOT EPA ARB blah blah. They just cork the engine
up.
Like going jogging or Mtn Bike riding with a potato
in your mouth.

 

I had the same setup and problem with my '04 RK. The SE slipons took a little power off the bottom and put it on top. I didn't think it was worth the noise, so I re-installed the stock mufflers. With the SE/AC and Stage 1 burn, the engine still ran too lean. A PCV w/canned map from Fuel Moto solved that problem nicely.

 

I had them do the re-map and air cleaner before I replaced the mufflers and it ran just fine with stock mufflers. I dont see why you would have to tune it to switch back. Harley says there is only one download, dont know if that is actually the case or not. I would think there would be more.