2001 WR426 5th gear

4 replies to this topic
  • skunk

Posted August 11, 2003 - 10:41 AM


Road legal 2001 WR426 UK model, 2300 miles. Just replaced 5th gears and selector fork as jumping out (feels like a misfire). Apparently there have been a few back to the local shop with the same so common fault? The metal doesn't look that hard and it looks like the dogs were only meshing about 50% to start with so it looks like a [@#$%&*!] design fault. Not heavy footed as the lower gears would be shagged and they are like new. Anyone else? Love the bike but can't afford the rebuilds, probably a KTM next time (unfortunately). Let me know

  • Hick

Posted August 11, 2003 - 03:31 PM


A few guys, me included, had problems with fourth gear in their YZ 426s. My dogs did not get worn however, but I had chips in the load-bearing face of each tooth on both fourth gear wheels.

I think they went with the 4 speed in the new YZ to allow for wider, stronger gear wheels.

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  • SFO

Posted August 11, 2003 - 03:42 PM


You can shim the fifth pinion gear to get more engagement.
This is not an oem thing, just something I learned building turbo GS-1100's a few years back.
A good motorcycle transmission shop can help you build a bullet proof 5sp.

I have had excellent results from R&D.
They don't have a web site but here is their #.
R&D Transmissions 813 725 2446

  • Dan_Lorenze

Posted August 12, 2003 - 10:01 PM


Yep, the ole 5th gear skip.... I had it on my 01 WR426 after thousands of miles...

  • FTD

Posted August 14, 2003 - 06:21 AM


5th gear? What's that? :)


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