Rode to the dealer today to discuss mods and warranty issues. I have ordered a pair of CFR slip ons and will order a set of true dual head pipes in the coming weeks. When responding to my questions the service (tune) guru said to make sure that I purchase high flow head pipes. So now I show my ignorance. What is the difference between standard headers and high flow? Additional mods will include a SERT and a dyno pass for tuning. Thanks in advance.

 

Tuner probably meant - make sure that you replace stock headers if they have a cat in them. ( the 2010, 2011 headers have catalytic converters which is a bottleneck to flow) also make sure your new header pipes will match your oxygen sensors ( if equipped) as there are differences 2008,09 & 2010, 11

You may want to ask him about your true dual choice, if that is something he can tune around as true duals can show markedly less torque performance...or he may have had experience and good results with them.

and you are doing hi flow air cleaner? otherwise none of the rest will really matter.


....and get their warranty promises IN WRITING

mike

 

Mike, I was told to make sure that the headers had provisions for the O2 sensors. As everyone may guess, I have no experience in doing mods to the scoot. Suggestions for headers would be welcomed. I do not want to loose bottom end torque due to exhaust issues. I just want a little more pep when I twist the wick. And yes, I will be adding a high flow air cleaner.

 

If your trying to maintain low end grunt, you might not want to go to a true dual set up. Maybe the V&H 2-1-2 or just have the cats blown out your stock heads.

 

Yes, then reconsider on the true duals- a 2 into 1, 2 into 2 or removing the cat from the stock headers ( if equipped, what year is yours?) would be much better for torque.
AND if cahnging headers you have to match years to ensure that the 02 sensors fit ( remember there are 2 versions- 2008,9 and 2010, 11)

and do the air cleaner before tuning.

air cleaners are pretty much a cosmetic affair- all of them flow as much as the motor can use. even using a hole saw on the stock plastic housing is an improvement ( air flow is controlled for noise emissions).

the filter media is important- many riders use K&N style filters which are reusable, and are washed and re-oiled a few times a year - so you have to be interested in doing that.

the current harley Screaming Eagle filters are washed in dishwashing soap, but not oiled ( which I think inferior) - but a N&N filter can be sourced to fit the housing.

on my 09, I went with the Ness Big Sucker, it is a very tidy 15 minute install, no special tools or skills needed, uses the stock cover ( which I like because it doesn't push my rt leg out) has a washable & oiled filter ( but not a K&N brand) and i got the one with the chrome backing plate (the chrome plate complements my motor and is easier to wipe clean when washing compared to the black or grey). ebay $115 from easternpc incl. shipping


reasonable expectations will be an increase of 10 or so horsepower.


mike

 

Thanks guys. I will look at the 2-1-2 headers. I don't want performance to suffer just for the look of the true duals. I am familiar with the K&N filters as I have used them for years on my pick ups and autos. The Ness Big Suckers sound interesting. I, too ,don't want to push my right leg out any further with a larger housing. The cat in my '10 Ultra is hot as heck even in this early spring we call winter here on the coast. I know it would be cheaper to knock the guts out of the original header but don't want the down time involved due to my lack of welding skills.

 

fuel moto sells a nice package 2-1-2 headpipe se backing plate with k&n filter and the pv5, less expensive if your tuner will use it, or run the preloaded map and save even more $.