WR450F With FMF Q Noise Test

3 replies to this topic
  • ETP

Posted March 23, 2003 - 04:00 PM


Does anyone know what the redline is on the new WR450?
I had a noise test performed on my Canadian bought WR450F with a new FMF Q exhaust at Hungry Valley State Park, CA today. The ranger's RPM reference book did not have the new bikes in it, so he tested it at 4500RPM (97.5DB) and 4000RPM (95.5DB). He said that the test RPM is suppose to be 1/2 the redline RPM. Haven't found redline level in the manual yet. If it is higher than 9000, then most of the new pipes will not pass the 96 level should they start being strick about it.
The ranger man says they are to start testing for 96DB around April with a 1 to 2 DB grace.

  • ekemner

Posted March 23, 2003 - 04:11 PM


The ranger is wrong! It is not half the redline but half rpm of the maximum horsepower rpm. You need to check at 4250 as the WR max hp is at 8500 rpm.

Eric :)

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

Posted March 23, 2003 - 04:34 PM


Thanks Eric,
That sounds more like it. But what is the WR's redline?

  • ekemner

Posted March 24, 2003 - 02:49 AM


Redline is 11,500 rpm so you do not want to test at half taht!! :)


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.