YZF426 Must be Quieter

8 replies to this topic
  • ewd199

Posted August 09, 2009 - 11:25 AM


Does anyone know what exhaust would make my 426 the most quiet without robing it of power. I have D&D exhaust right now and I don't want to spend a whole lot of money on another one. I heard the FMF Q4 is the way to go but that thing is exspensive. I need an exhaust that doesnt allow the sound to travel very far. Any suggestions would help, thanks.

  • The-Extractor

Posted August 09, 2009 - 11:30 AM


Maybe get the drd silencer for $50 from their website, my wr450 is stupid loud, I def need to get the insert.

  • ewd199

Posted August 09, 2009 - 11:35 AM


will that fit in my exhaust, do u have a D&D exhaust? Mine is not drd.

  • The-Extractor

Posted August 10, 2009 - 08:36 AM


I thought you might have mis typed it. I didnt know there is Dr D and D&D , so it will probly not fit... I have DR D exhaust on mine...

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  • Mikek671

Posted August 10, 2009 - 08:57 AM


You can look into the DB Dawg, they sell various sizes and might have one to fit your aftermarket exhaust. If you change the jetting a bit the power loss is minimal but the sound difference is worth it. I could not ride my local spots without one, makes my 250F sound like an XR.

  • mr426

Posted August 14, 2009 - 09:37 PM


i just got my fmf q4 on ebay for 199.99. brand new in the box for 03 yz450f but it easily fits onto the 426. also got a fmf sx powerbomb for 87.99 new. got to love ebay.

  • ewd199

Posted August 15, 2009 - 12:53 PM


yo wat is the diameter of the exhaust that you got at the spot where it slips on to the header, because i don't want my header to be to be to big

  • mr426

Posted August 16, 2009 - 11:35 AM


Not sure the exact diameter but it slips right over the stock head pipe nice and snug. Just add a little high temp silicone to the tip of the head pipe first. The stock clamp does not fit but it fits soo snug and perfect that you dont even need a clamp.

  • ewd199

Posted August 16, 2009 - 07:29 PM


dude can you just roughly measure it for me, my header is not stock, you wouldn't have to take it off or anything, just stick a tape measure up to it. I need to make sure the diameter is close to 1 an 7/8 of an inch. If you could do that for me I would really appreciate it.

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