WR Conversion


7 replies to this topic
  • va426

Posted June 25, 2012 - 01:24 PM

#1

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)
5GS-81910-50-00 (REGULATOR/RECTIFIER)

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

#2

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

  • va426

Posted June 26, 2012 - 07:51 AM

#3

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


It's a 2001 YZ426f.

  • grayracer513

Posted June 26, 2012 - 08:09 AM

#4

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

http://www.thumperta...52#post10674552

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.

http://www.yamaha-mo...uals/index.aspx

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  • va426

Posted June 27, 2012 - 08:03 AM

#5

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

#6

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

#7

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

#8

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





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