CA sound regulation White Bros E-series

4 replies to this topic
  • indiandunes

Posted May 04, 2005 - 09:40 AM


I have YZ 426 with a White Bros E-series muffler. I also have the useless quiet baffle insert thing. How many washers, or plates do I need to run to get it at 96db. I run 12 now for tracks.


  • 426Hurricane

Posted May 04, 2005 - 07:09 PM


I run the wb eseries on my 00 426 and there is no combo that will bring it down to 96. (at least not with mine) some use 4-5 disks but lose all low end. I know where you can get a used FMF Q for like $90 plus shipping if you want to quiet the beast down.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Turf_Runner2

Posted May 05, 2005 - 09:37 AM


I have the same bike and I had to go to 4 disks and it passed. I ran like hell but it was better than packing up or paying the fine @ Holister.

Turf Runner

  • indiandunes

Posted May 06, 2005 - 08:53 PM


thanks for the responses. I'll try 4-6 discs with the quiet insert.

  • Daz_426_02

Posted June 06, 2005 - 03:02 AM


426Hurricane, Do you have any news or links on where to get that FMF Q from that will be much appreciated… :)

Related Content


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

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

Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

Megabomb Fitment by 288yz450

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply

Michigan Motocross Tires by 288yz450

Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply

First Hare scramble tips by dhend8

Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • Hot  33 replies

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.