08 yz450 PMB Spark Arrestor Pics

4 replies to this topic
  • davcon

Posted December 27, 2008 - 03:49 PM


Installed today. Now I'm legal! Didnt see any pics with it on a bike when I was looking to buy. Hope this helps others. Used a drill press with a step bit to drill out the existing rivets. Used a vice to remove the stock end tip. Used a hand drill for the new pop rivets. Easy install. Sounds and looks good.

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  • Wiz636

Posted December 27, 2008 - 05:31 PM


Looks good, thanks for posting the pics. Notice any power loss or sound reduction?

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  • tribalbc

Posted December 27, 2008 - 06:21 PM


I have one on my 08 YZ exhaust on my 07 WR. I found power output to be about the same with a different sound but similar DB noise. Test around 97-98db. I run mine with the silent insert to pass the 96db at races. Come in just under 96. Silent insert seems to smooth the power out a bit with maybe a small loss.

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  • tribalbc

Posted December 27, 2008 - 08:29 PM


One thing to add. That shot is from June. The andonizing on the endcap is now a dull grey. No biggy if you don't worry about the bling factor. I only clean with straight water so I figure it is either from heat from the exhaust or our mud is really acidic ??:busted:

  • davcon

Posted December 28, 2008 - 07:16 AM


Looks good, thanks for posting the pics. Notice any power loss or sound reduction?

Havent had a chance to ride, just idle in the driveway. Its not louder but did notice a "flutter" sound at low rpms. tribalbc said it well " different sound but similar DB noise"

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