05 best aftermarket exhaust

10 replies to this topic
  • Neysbo

Posted April 18, 2005 - 09:05 AM


Would like to hear some thoughts on aftermarket exhausts for the 05 YZ450.
With the detuning for 05 , I am real curious to see which silencers and head pipes help regain some of the hit.

I am real interested in the new Mega Bomb by FMF- does this header require the use of a FMF silencer and mid pipe or will the stock silencer work.


  • Ga426owner

Posted April 18, 2005 - 01:19 PM


this will cause many an argument - mine is better than yours.....etc.....

FMF is good, WhiteBros is good, procircuit is good - how much do you want to spend?
then there is the no names that so many love - Jemco, CHM, thunderalley,,,

  • 226DAD

Posted April 20, 2005 - 07:56 AM


BIG GUN, added a little more bottom end and rev on the top.

The 05 was not detuned, it lost no power, the power was spread over a wider RPM range to make it smoother = faster.

  • tnl

Posted April 20, 2005 - 06:22 PM


Good quote!

  • Thumper38

Posted April 21, 2005 - 05:12 AM


Try the procircuit T4 or Ti4, compared to stock it works very well!

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • rmracer27

Posted April 21, 2005 - 08:03 AM


I have the Pro Circuit T4 and it seems to really help the bike. No complaints here.

  • Neysbo

Posted April 21, 2005 - 10:19 AM


Do you guy's with the Pro Circuit have the low boy headpipe as well or just the silencer


  • rmracer27

Posted April 21, 2005 - 11:17 AM


Have just the silencer only.

  • Thumper38

Posted April 21, 2005 - 12:12 PM


Only the silencer!


Posted April 21, 2005 - 12:12 PM


Try the new Yosh Comp TRC!

  • mnm567

Posted April 21, 2005 - 02:05 PM


I put the Dr. D slip-on on my 05 450 and noticed an increase in the low and mid portion of the powerband. Awesome exhaust, it isn't too loud, comes with a spark arrestor, and has the option for a quiet core insert plus it is a good price. This exhaust was designed by the man who knows yamaha four stokes best. Matt

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