I've searched and read what I could find on this subject and maybe I'm just a little thick.

1) Can you change the exhaust side of a stock engine say to SE slip-ons without remapping the fuel?

2) When you change the air/fuel mixture on the intake side you must makethe mixricher because you just leaned it out by adding more air ?

3) When you change both the air cleaner and pipes you have to change the F/A mixture!

Does that sound right to you?

Thanks and ride well,

Jim

 

1) NO

2) YES

3) YES

Greetz,
Peter

 

You are right...you can put new mufflers without doing much else, but if you change the intake then you need to do something to add more fuel to the mix. Many here use either the PCIII or SERT...personally I prefer and have the SERT installed on my 08 UC with Vance and Hines slip-on mufflers and the SE air cleaner.

 

The '07 Christmas catalog that came, has the requirement added to each Screaming Eagle air cleaner listing, whether by themselves or with a big bore kit, thatrecalibration must take place. There is no such requirement listed on just muffler options.

This is in direct contrast to the information on the Nightrider site that says recalibration is not necessary.

 

It's your scoot, you can do whatever you want with it, within reason. You are correct in your reasoning. I would advise a SERT, pcIII or Thunder Max to help with the tuning.

 

1. Yes if it is EFI as there is enough "adaptive learning" that will compensate for the lean condition with just slip-ons and no further mods.

2. Yes

3. Yes

 

Thanks everyone, this example is exactly the cause of my confusion. Although it doesn't take much anymore Whether an oversight or not. When reading thecatalog it leaves me to thinkI can change the exhaust to SE slip-ons with no other changes required.

"Screamin' Eagle® Street Performance Slip-On Mufflers - One Piece

New Street Performance Touring mufflers combine aggressive sound quality with aggressive performance results. High flow internal design produces performance you can feel, comparable to Screamin' Eagle® II race-use mufflers. Street legal, these chrome-plated mufflers feature a new ballistic-shape inlet and a deep embossed Screamin' Eagle® signature script. Street legal on stock displacement engines. Patent pending"

I know assumptions are dangerous. You could also assume you could just buy the big bore kit and slap it on as well.

Thanks again & Ride well,

Jim

 

MNPGRider where on night riders site does it say that? They sell what is basically a couple of resistors that lower A/F ratio to enrich and lower heat.
My understanding (and I am no expert) is that 07/08 bikes run very lean for EPA and thus hot. So anything that may make them run leaner including freer breathing pipes will make them run hoter so fuel management becomes important.

I have been following discussion about Terminal Velocity II on another forum. Anybody here know about this product or use it?

http://www.terrycomp.com/