FMF factory 4 spark arrestor?


3 replies to this topic
  • byggd

Posted October 24, 2006 - 02:24 PM

#1

My son just picked up a 04 yz450. It has a factory 4 system on it including the power bomb header. The guy he got it from rides mostly desert so he wasn’t concerned with noise or a spark arrestor but personally I feel the bike it too loud. My son wants to go ridding with me and I ride where both spark arrestor and sound db are enforced. Is there something I can do to the exhaust to quiet it down a bit and make it USFS approved?

  • grayracer513

Posted October 24, 2006 - 03:30 PM

#2

FMF makes a spark arrestor for it, but I don't recall a "quiet insert".

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • 642MX

Posted October 24, 2006 - 03:38 PM

#3

I'm not sure how loud you can be, but...

I have the powerbomb header and Titanium 4 muffler (titanium version of the factory 4). The BRC sound tested me last weekend and I was at 98.5 dB with the quiet core and fresh packing.

On another note, my wifes 250F checked in at 92 dB. Its equipted with a FMF Q2 muffler.

  • byggd

Posted October 25, 2006 - 08:09 AM

#4

Thanks for the info! I was looking at the FMF website but no pictures are available for the insert or spark arrestor so I wasn’t sure they were the right style….maybe I’ll give FMF a call just to make sure. I think I’ll start with the spark arrestor and fresh packing before spending the $$ in the insert and see how it sounds.





Related Content

Forums
Photo

05 yz450f not fast enough by RedeyeYZ


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies
Forums
Photo

YZ450FX OR YZ450F by MESSMAKER


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  30 replies
Forums
Photo

The "going back to the other darkside" adventure... by Monk


Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies
Forums
Photo

1998 yz400f will not idle. by trolley


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  32 replies
Forums
Photo

Should I buy this bike? help....... by Numsa Hul


Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies
 
x

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.