Header Options - 2006 WR450F

5 replies to this topic
  • FzerozeroT

Posted November 22, 2009 - 04:06 PM


Hi, have had the big search and can't find the definitive answer to what the 'best' header option is (for my desired application :bonk: )

I feel that my WR is a little boggy/snatchy with light throttle applications particularly at low RPM.

The bike that I want to replicate the bottom end of is a DRZ400 (with pipe) that I had a chance to ride a few weeks ago, the one redeeming feature was how easy it was to use at low RPM on wet clay. Also had a spin on a new injected CRF450X last week, not so impressed :excuseme:

Also I want something that looks a little nicer, I have had good results with HPC coating on my roadbikes and so figured I would have that done if I get stuck with a steel header

I'm currently awaiting a JD jet kit so this may help more than the pipe? But popular opinion is that doing both ends is the dogs bollocks.

The options I have thought of are

1. Standard header (HPC coated) and slip on pipe
2. YZ header (stainless?) and slip on (or full YZ system)
3. Aftermarket full system

Bear in mind that I have no need of extra power, I have 3rd gear powerstands and 4th gear clutched wheelies at will.

  • 123BigcoopDawg576

Posted November 22, 2009 - 04:21 PM


The options I have thought of are

1. Standard header (HPC coated) and slip on pipe
2. YZ header (stainless?) and slip on (or full YZ system)
3. Aftermarket full system

FYI the 06 already comes with the YZ header stock :excuseme:

  • ww44wrf450f

Posted November 22, 2009 - 05:31 PM


The 06 has a decent header already, it sounds like your talking about off idle bog. I would recommend a slip-on pipe and setting your AP timing, o-ring mod. on the carb. I like the s.s. DR.D slip-on pipe or fmf or a used yz pipe is a good bang for the buck?

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

Posted November 22, 2009 - 06:33 PM


Cool, I was unsure with all the variations in pipe sizes etc, I have got my eye on a Bills Pipe here in NZ for $200USD.

Just didn't want to get it, then discover I really needed a YZ or aftermarket header that then wouldn't fit that pipe.

Cheers guys, anyone esle care to add experience where the only thing they have changed is going to the p-bomb header etc?

There is a supplier in NZ that can do a stainless Two Brothers YZ header for $180USD, now I know that it fits the pipe, would this make much difference with the standard can?

  • ww44wrf450f

Posted November 23, 2009 - 05:39 AM


A new header pipe is not going to help with what your looking for --- it's your jetting and AP Timing -- If you can find a fmf stainless steal header - ya - but it doesn't solve your jetting/AP timing ? are you on-road or off-roading with the bike -- look up Ap timing!

  • FzerozeroT

Posted November 24, 2009 - 09:34 AM


Jet kit should arrive this afternoon :excuseme:


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.