Looking for advice on an exhaust system


4 replies to this topic
  • jasen 2007

Posted April 20, 2011 - 06:01 PM

#1

My bike is an 05 YZ450f. Its got great power, just looking for a little more. My son has an 06 KX450f with a pro circuit TI4 system on it. It seems to pull a little harder than mine. It also feels a little smoother all the way through the power. I would like to know what you guys recommend.

Thanks

  • rcdude33

Posted April 20, 2011 - 07:57 PM

#2

There are many exhausts that are great and very comparable. On my 09 yz450f im going to get the fmf 4.1 with the megabomb. That should add some bottom and mid and top.

The powercore 4 should be a good pipe for the price.
I heard that the DRD is an excellent pipe and you cant beat the price of it either. It should add some bottom and mid and maybe top.

But heres the thing, i never got to run these pipes so maybe poeple who have them can help you out better than i can, im just going by from what people have said.

But there are many more brands, MRD, leo vince, arkapovic, gytr, etc. But also what kind of riding are you doing?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted April 20, 2011 - 08:19 PM

#3

Here's how I see it:

http://www.thumperta...676#post7489676

  • jasen 2007

Posted April 21, 2011 - 04:57 AM

#4

What about this, The previous owner of my bike removed 4 inches from the stock silencer. I didnt notice this untill I saw another 05 side by side with mine. The bike seems to run fine, I just dont know enough about 4 stroke exhaust to know what this will hurt or help... This was the reason I was looking to get an aftermarket system.

  • theraymondguy

Posted April 21, 2011 - 07:05 PM

#5

What about this, The previous owner of my bike removed 4 inches from the stock silencer. I didnt notice this untill I saw another 05 side by side with mine. The bike seems to run fine, I just dont know enough about 4 stroke exhaust to know what this will hurt or help... This was the reason I was looking to get an aftermarket system.


Removing ~ 4" of the muffler will reduce back pressure, have significant effect on scavenging and depending on the bike's fuel system a negative effect on fuel economy; if it's strictly carburetor then it will lean out the fuel/air ratio slightly as well.

Generally speaking homemade mods on exhaust / fuel systems in performance oriented engines are detrimental to longevity; further more these mods when made without the benefit of a gas analyzer (and a baseline set of values) are also detrimental to longevity. Yamaha (as with all reputable power sport manufacturers) place tremendous resources into making their engines reliable and powerful; I'd turn to them first to see if there was a kit available (be it either exhaust or what have you) for your specific model.





Related Content

Forums
Photo

YZ450F 03 Sparks driving me crazy by SirAttard


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Forums
Photo

100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 replies
Forums
Photo

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.