HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
trailriderjoe

I ran some sound tests on the 05 WR450 exhaust

11 posts in this topic

Hey gang,

For those of you interested, I just got done running some crude sound measurements on my 05 WR450 exhaust.

Environment:

Cold(35°F), damp, overcast, 15 mph breaze, open field (nearest building 75ft).

I used a calibrated B&K sound analyzer "mediator 2238"

This is not a cheap radio shack model, we are talking a $5k machine I borrowed from work :) .

As far as professional analyzers go it's still the bottom of the line :) .

All tests were performed per the SAE J1287 standard.

Results:

No insert, No SA, No tail cone/cover WIDE OPEN CAN = 100 to 100.5 Db

No insert, SA installed, tail cone/cover installed = 96.5 Db

No, insert, No SA, Just cap/cone installed = 97.8 Db

"modified insert", SA installed, tail cone/cover installed = 94 to 94.5 Db

This is a link to what my cone shaped "modified insert" looks like.

http://img.photobucket.com/albums/v610/trailriderjoe/IMG_0846.jpg

Thoughts?

Share this post


Link to post
Share on other sites

Sorry to hijack your thread, but can the 05 pipe fit on an 03 header? I hope this hasn't been covered too much.

Thanks

Share this post


Link to post
Share on other sites

Not a clue, but what I've seen of the mounts they sure look a lot alike.

Myself, I'd leave the 03 pipe on and just work with the various insert around to get the performance you're looking for.

Share this post


Link to post
Share on other sites
Sorry to hijack your thread, but can the 05 pipe fit on an 03 header? I hope this hasn't been covered too much.

Thanks

From what all the aftermarket pipe makers show the 03-05 YZ/WR pipes and silencers all interchange.

Joe

Share this post


Link to post
Share on other sites

Yes. I have a 03 WR 450 with a 05 WR450 muffler with the stock 03 titanium header. They bolted up like they were made for each other. You will need the rear rubber mount which is nothing like the 03 rear mount.

Jim

Share this post


Link to post
Share on other sites

Thanks for the info. I appreciate the effort on doing this and posting it. Your modified tailpipe looks awesome. Does the coned endcap still fit? :)

Share this post


Link to post
Share on other sites

I installed a 2005 exaust on my 04 450 and it totally changes flow compared to stock WR pipe with either the PMB or GYTR insert which I have used both with the stock muffler.

I also have been running a KTM EXC muffler for the last four years to meet sound for races on 250F and 450F and the 05 exaust works much better and tone is lower than the Katoom exaust which was heavier but did the job and now I am so happy that Yammie finally put on Euro style exaust.

Db for KTM exaust was 94db by AMA standards and I'm certain the 05 will be under 96 easy. :)

Share this post


Link to post
Share on other sites

Hey gang,

Looking to do some more mods to the stock 05 pipe again. Similar to what basicblues is doing (by the way basicblues...keep up the good work), but I'm looking for a donor 05 stock insert. Not really in the mood to cut mine to pieces AGAIN. Anybody willing? I'll pay shipping plus a few bucks? Maybe one of you guys that's got the PMB already :)

Thanks

Joe

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0