Barker's Official Blog

How to select the right aftermarket exhaust for your ATV or UTV

Buying a new exhaust for your atv or utv is by far the easiest and fastest way to gain lots of extra power from your machine.  But before you buy, It’s important to do your research and not run out and buy the first or cheapest exhaust system you find.  Nothing is worse than wasting your hard earned cash on something your just not happy with. In order to avoid that, here’s some things to keep in mind:

PERFORMANCE

If you’re like me, the first and most important thing on your list is performance.   Performance can sometimes be the cure-all for any other downfalls you may see in a product.  Even if it looks and sounds like someone stuck an old soup can back there, if it outperforms everything else, your happy and ready to sing its praises. 

All exhausts are not created equal, the power delivery for every pipe is different.  Sometimes its hard to determine which exhausts perform the best.  The easiest way is to read your favorite atv or utv magazine pipe shootouts.  They usually have the best expert opinions plus dyno runs with hard figures you can compare.  Its also a good idea to look at what people have to say on popular online forums.

You can learn a lot from dyno sheets, learn how to read them and what the number’s mean.  The pipe withthe highest peak horsepower number doesn’t always mean it delivers the best “useable” power.  You want to find an exhaust that shows good power increases throughout the powerband.  Keep in mind your riding style and around what rpm range you do most of your riding. 

Keep in mind, If you plan to modify your motor in the future you may want to go with and exhaust that performs better on a modified motor versus a stock motor.


LOOKS

This part is fairly self explanatory.  Just keep in mind that there are many different styles and options out there for exhausts  like: different shapes, exhaust tips, colored, chromed, brushed aluminum, carbon fiber and way more. 

SOUND LEVEL:

As time goes on this particular area has become more and more important.   Alot more than just your comfort level should be considered.  You should always check with your favorite riding area to see if there are sound restrictions.  Most tracks also have restrictions/ limitations.   

What typses of activities will you be using this ATV or UTV for?  (i.e. Hunting)  It’s not always fun to swap out your new exhaust for the stock one, every time you want to keep things quiet.  Do you ride through your own, or other,  neighborhood to get to your riding area?  Not fun to deal with angry neighbors or pay tickets.  Plus as an ATV community it’s important to be respectful of others,  the last thing we need is an excuse for someone to close another trail or riding area.

Another thing to keep in mind if your riding in national forest is if your exhasut USFS approved or does it have an USFS approved spark arrestor.  If your not sure contact the manufacturer.

MANUFACTURER:

You should feel comfortable with the exhaust manufacturer, do they have good a good reputation for developing good quality products?  Are they well established in the industry?  Are they available for product support?

ASSOCIATED COSTS:

Make sure you are aware of everything  that comes with the purchase of your exhaust system.  Here a a few things to look for:

-          Jet kit or proper jetting recomendations.

-          EFI controller for fuel injected systems

-          Are you paying for a full system or slip on

                     A.  generally an aftermarket header may only net you a couple horsepower. Is this worth the additional cost?

-           Air intake system

When weighing the Cost it is important to keep in mind these additional purchases you may need to make.

Purchasing a new exhaust system for your machine isn’t a cheap or simple process.  Do your reasearch.  In the end you’ll have the peace of mind that you spent your money wisely.  Be safe and Have fun!

Article provided by our friends at ExhaustTracker.com
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Dyno Results For Yamaha YFZ 450 R Exhaust

I was reading the www.yfztech.com forums & came across this post by "Buddha" from Sand Mountain, UT on Dyno results for a Barker's Yamaha YFZ 450R Full Exhaust:

Well the best we could do is:
47.85 HP
31.62 TQ
The curve is very good and a huge improvement over the PCV. 

We started at 39.24 HP 25.79 TQ. Remember this is at 4400' above sea level on KBR's old Dyno. The MSD made a huge improvement with as much as 8 degress timing on the top end and as little as 5 degrees on the bottom end. I was expecting more, but that's what it is. My next mod will be boring the TB and maybe a Mmad intake cam. Also the head will probably be coming off for some expoxy. That won't be till summer as our riding season is here and I don't want any down time. 
Also those numbers are with the Barker pipe. The Dasa pipe was .25HP-.50HP lower than the Barker. The Barker comes on sooner and lasts longer than the Dasa. Kind of glad I went with the Barker.

Note that we've got two versions of this pipe:  the 2004-2009 Carb Model YFZ 450 and the 2009+ EFI Model YFZ 450R

To read the entire thread on dyno results for the Barker's Yamaha YFZ 450R Full Exhaust click this link http://www.yfztech.com/forum/index.php?showtopic=25267

 

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