WR Conversion

7 replies to this topic
  • va426

Posted June 25, 2012 - 01:24 PM


I'm in the process of procuring the parts necessary to street legal my YZ. Am I correct that the three WR parts needed for the conversion are?:

5NG-85560-00-00 (STATOR)
5NG-85550-00-00 (FLYWHEEL)

Would it behoove me to procure a WR harness as well? Also, do I need a WR CDI, or will the YZ CDI function?

  • grayracer513

Posted June 25, 2012 - 03:15 PM


This entirely depends on what year YZ you have...

  • va426

Posted June 26, 2012 - 07:51 AM


This entirely depends on what year YZ you have...

It's a 2001 YZ426f.

  • grayracer513

Posted June 26, 2012 - 08:09 AM


You can run the WR stator with the YZ CDI IF you do the mod shown here:


Beyond that, the WR harness may be handy to cut terminals from, but it isn't really needed. You can connect your lighting with a harness you build yourself. See the manual for the OEM schematic.


Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • va426

Posted June 27, 2012 - 08:03 AM


Thank you so very much for the info!

I have a 2000 WR400 frame and subframe that I am going to be swapping with my 2001 YZ426 stuff. There shouldn't be a problem in regards to fitment, right? The mounting points look very similar and I can't imagine them not interchanging. The only questionable things would be if the swing arm and triples swap, but I am thinking that most everything should be workable.

  • va426

Posted June 27, 2012 - 08:06 AM


I also have a WR400 bottom end that I am contemplating on removing the gears from....I heard that the gearing could interchange. I don't think they changed a lot from the 400s to the 426s other than the crank, rod, and piston, correct?

  • grayracer513

Posted June 27, 2012 - 09:03 AM


The 426 clutch is considerably bigger and stronger, and takes a larger case cover to enclose it, but the trans should drop straight in.

  • va426

Posted June 28, 2012 - 05:07 AM


Thanks again for the help. I'm working on a wr400/yz426 supermoto project. I'm sure this will be an interesting puzzle.

Related Content


Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies

Michigan Motocross Tires by 288yz450

Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply

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.