Yosh Tri-Oval Pro Exhaust, Jetting?

Anybody have any insight on this pipe? Did a search and really didn't find too much. Did you have to make any jetting changes? Where did it perform best?


This may be a bit of a pain, but I know Dirt Rider magazine did an exhaust shootout several months back - it was pretty comprehensive and as I remember they rated the Yosh pretty high. I'm sure if you check the back issues you may be able to find the information.

You might even search previous posts, I know the shootout has been discussed several times.

Good Luck

Thanks, that's a good place to start!

I'm very pleased with mine. It gives you a litle more pull on the top end. I did not have to touch my jetting at all when I put it on. I would say that there is a pretty big downfall though. The bracket that they use for the muffler itself wraps all the way around the muffler. My subframe got a little tweaked in a wreck and the rear tire grapped the bracket and bent up the muffler pretty good. I was able to pound it back out and re-pack it like new, but the bracket is no longer used and I have no problems. The back pipe mount is close enough to the muffler and the muffler is light enough (the other reason is that I have not been able to get a new bracket yet. . . anyone out there in TT land got an in?).

Sorry for the long windedness, but the short of it all is: no jetting changes required, and if you get a Yoshi Tri-Ti, put somekind of spacer between the subframe and the muffler bracket mount (besides the one that comes with it).

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By GarrettSG
      I need recommendations on Honda dealers with good Mechanics in Western Washington. I am in Puyallup but will drive for peace of mind. I have never had a dealer do major work on any of my dirt bikes. But long story short I am on a 15 CRF450R and it needs the 5th gear recall done. Any and all info is much appreciated! 
    • By jakebarritt
      I have a 2005 CRF450R with a Trail Tech fan kit installed. I need a little bit larger tank and would like to know if anyone has an aftermarket tank that fits with the fan kit.
      I dont need a monster 4 gallon, just maybe a 2.4 or 2.7 from IMS would do fine.  I talked with both the tank vendor and Trail Tech and neither could give me any answers.
      Thanks guys.
      Minden, NV
    • By NickC18
      So I emailed Factory Connection today to see what spring rate I need for the rear as I’m about 6’2” 220 lbs without gear. I also asked for a baseline front fork PSI to start at. This is what I received:
      The spring series we made for your bike is limited when it comes to larger/stiffer rates.  
      The spring rate you need is 5.9/6.0 range. We don’t sell that over the counter as it requires special installation process.  So we can’t sell the spring “over the counter”.  It would have to be installed at our shop.  
      Fork PSI I would recommend:
      Inner 160 psi
      Outer 11 psi
      Balance 160 psi
      Are they blowing smoke up my ass? What kind of ‘special installation’ could a spring take? I’ve changed and removed them before but not on a 16’ CRF before.
      Also, aren’t those psi settings for the Kawasaki KYB? I don’t think the psf2 have inner/outer/balance do they? Maybe he was having a bad day...or maybe I’m an idiot. FC’s website list there spring as ALS-0059. Can I not just order this spring and install it to set my sag correctly? Help?
    • By johnsbikerepairs
      hi, i have a crf450R 2009, having difficulty setting the idle knob to factory setting.  Having problems interpreting manual Japaneses interpretation.  Can anyone out there assist with the correct factory setting and how i can manually do the setting ie how many clicks out or in etc...   would appreciate any assistance 
    • By Baja Designs
      Hello CRF450R Owners,
      Bailey here with Baja Designs.  We recognize ThumperTalk as one of the go-to sources for information on the CRF450R and we receive emails daily regarding the best inexpensive light setup or purchasing the B1K setup ran by Ox Motorsports.  We would like this thread to be a General Discussion area for members and guests to discuss Dual Sport Kits (DSK), Lights, and Lighting Acessories based upon stock and modified charging systems.  Please Post up if you have any questions or comments CRF450R related!