yzf 450 2010 Yoshi Insert Question

3 replies to this topic
  • scottwilson

Posted June 28, 2011 - 12:15 AM


Hi there,

currently i am running a full rs4 system on my yz450f, if i was to remove the insert and spark arrestor what difference would the make to my bike if any?

many thanks


  • wrdr-rider

Posted June 28, 2011 - 02:22 AM


It would definitely make it louder. Also, depending on how open your airbox is, it could make the bike run lean as you would get increased airflow. Not sure of the year of your yzf, but could require rejetting if carbureted.

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

Posted June 28, 2011 - 04:47 AM


Its a 2010 model cheers

  • rcmxracing

Posted June 28, 2011 - 06:08 AM


I have the same bike, same system and I removed it after talking to Yosh tech. It is much louder (not good), but does make more power. Yosh makes 94 and 96dB inserts with no spark arrestor. I'm considering a 96dB insert. If you call their tech line they are very helpful.

Related Content


Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017


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

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

BIGBORE FOR YZ450F 2006? by Taattie94

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 3 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.