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

Difference between YZ & WR450 exhaust?

3 posts in this topic

What are the diff. in performance between the 2. :)

Am I going to have to upgrade the stock pipe on the WR?

Share this post

Link to post
Share on other sites

My bike is a Canadian wr450, the silencer does not have removeable insert like the US model.I put the yz pipe on mine and cut the airbox snorkel out,etc.

The airbox mods, Pipe and jetting made an incredible difference. At least 10 hp I would estimate. :)

In fact the bike literally would not run with stock jetting after letting her breathe.

My friend flipped his yz over backwards and the first thing to dig into the ground was his pipe , which bent the subframe, cracked the airbox and squashed his pipe in one single expensive little loop out.

I looked at my yz pipe and decided since I got it real cheap, that I would cut 6" off the end of the can and cut the same amount off the core. I also ground down the diameter of the bolt holding the can to the frame. In essence creating a threaded shear pin, so if the pipe dug in it would break without damage to the subframe and airbox. Now my pipe only sticks out about 2" past the end of the # plate.

The shorter pipe gave my bike yet more throttle reponse and more power everywhere. I had to go up one size on the main jet as it ran a little lean with the previous 168 main.

I know it sounds like a backyard mod, and not very scientific but I wanted to try it out.

Pipe builders will think or say I'm an idiot but they earn a living selling pipes. Of course they will doubt this mod.

Hey, it worked for me and I saved $600 cause my pipe cost me $200, and it does not stick out like a ancor waiting do to $hundreds of damage.

Definitly the pipe will make a difference in power but it will be louder too. So if you have to pass dB regulations it will not work so well in that respect.

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