Need more exhaust advice please

[knuckles24]

Can someone tell me if you put aftermarket exhaust or drag pipes on your harley do you have to re-tune your bike :beer:

[homer]

Im not 100% sure . but i guess yes you need to re tune or re jet or both
only going by what ive been told .

[popelli]

Can someone tell me if you put aftermarket exhaust or drag pipes on your harley do you have to re-tune your bike :beer:


Only if you want it to run properly

If you want it to run poorly and lose lots of power and possibly burn holes in pistons from running too lean then it doesn't really matter

[Headbanger]

Might as well save up a little longer and get a Mikuni fitted at the same time, or bung a high-flow kit in the stock carb.

[firecrab]

popelli is right. it'll run, but you better re-tune it, because it'll run on the lean side of things. Especially the Twincam 96 (07 and later) runs hot already, so running untuned might be a bit risky.
Slip-ons are not as problematic I guess, since the EFI can correct the changes to a good part. Dunno about carbed bikes tho ...

[FROSTY]

I talke to the expert in harleys for someone elses bike--the answer is YES you need to rejet

[popelli]

Might as well save up a little longer and get a Mikuni fitted at the same time, or bung a high-flow kit in the stock carb.

the cv carb is not that bad and can be made to work properly

money spent on a mikuni would be better spent on a mild bolt in cam andrews ev27 or similar, give more power everywhere with no adverse side effects, this would give more bang for your buck than a mikuni carb

[Headbanger]

As much as I would agree the CV carb is held in a somewhat positive light by a good number of people, I am of the opinion its a smelly piece of poo and should be the first item ditched.

In its standard form shes a choked up mess, and when messed with there is no guarantee you can make her work to the desired efficiency. And yes I know there are people who are happy with what they can get out of it, I prefer not to settle for less so to speak.

Messed around with my last one for months with little cause for joy, Then bolted on a Mikuni and shes a new bike,

So, To me it makes sense to invest in a Mikuni rather then spend money on a high flow kit for the CV (absolute rubbish without one) and then potentially spending more money getting someone top tune it all to the pipes, again with no guarentee the CV will do as good a job as can be done (it simply won't)

Buying one in from the USA is pretty cheap.

[Headbanger]

Righto, For the thread starter, A kit to free up that CV carb.

http://www.harley-performance.com/stage-1-carb-kit.html

Contains

Deluxe and Complete Stage 1 Modification Kits include:

* CVP Performance Slide Needle for Improved Midrange
• Exclusively designed and sold by CV Performance.
• CNC Machined from Aerospace Quality 7075-T651 Billet Aluminum
• Mil-Spec Hard Anodized for durability.
* New Custom Light Weight Slide Spring
• Custom designed specifically for CV Performance
* CVP Vortex Emulsion Tube
• Designed deliver a vortex spray pattern for optimal fuel atomization.
• Precision CNC Machined
• Exclusively design, only available from CV Performance.
* Assortment of 2 New Main Jets
* Assortment of 2 New Idle Jets
* 2 Replacement Fuel Line Clamps
* Drill Bit for mixture plug removal and modifications
* Genuine James® front airbox gasket
* Easy to follow installation and tuning instructions
* Online customer support provided via sponsored forum
* Special - Free Stainless Steel Bowl Screw Kit!

Deluxe Kits include the additional EZ-Just Mixture Screw (see bleow)

Your Harley will perform at it's peak without compromising driveability. Faster warm ups, smoother response, steady idle characteristics, and reduced "coughs" or hesitation compared to any stock set up. Wake up your engine's potential and feel the hidden performance within your Harley. Also a great way to renew any Harley carburetor that has been neglected or incorrectly jetted.

Combined with any exhaust and air cleaner upgrade, modification of your Harley's carburetor is a must to achieving a true Stage 1 upgrade. Unlike race kits which require expensive dyno tuning or installation of odd hybrid parts, the Stage 1 Carb Tuner Kits from CV Performance utilize your carburetor's built-in tuning capabilities.


Cost is $53 USD plus delivery

You will also need to sort out the air-flow.


The site linked above has plenty of info in regards to spending money on HD engines, Here is the start page http://www.nightrider.com/biketech/hdengines.htm

and this one http://www.nightrider.com/biketech/hdengines.htm



Both sites have a wealth of info.

[ratast]

Would like contact details of Triple z ? Muffler gurus. Can not find page I was reading. Thanks Ratast

[Rob Taylor]

Put a Dyno jet thunderslide carb kit in it.There was one on trademe new for $150 for 1340.Its easy to fit with instructions supplied.If not www.ktlbikes.co.nz will get you one $250....1340 or 1450. Thats all you need.Forget the Carb change etc its not needed to get it to go.