YZ426 Grabby clutch


12 replies to this topic
  • mark63

Posted December 07, 2006 - 06:23 AM

#1

I have a WR426 with all the YZ 03 cam and all jetting mods :worthy: . I did the YZ03 cam mod to my buddy's YZ426. We went for a ride, he was impressed. We swapped bikes and I could not believe his clutch:foul: . Grabs while letting out, easy to stall, awful:thumbsdn: . He could not believe how smooth mine was. He had previously complained about it and I told to remove all the plates and make sure they all had the shiny side (smooth edge) out. He said that made heaps of difference. He also replaced the plates at the same time. Any idea's what he can do considering how good my original WR clutch is. Are they different? ::D

  • YZ426F Rider

Posted December 07, 2006 - 07:27 AM

#2

What kind of oil is he using?

  • moto2000

Posted December 07, 2006 - 07:28 AM

#3

If your buddies YZ is a 2000 model, he may want to put the updated 2001 parts in his clutch. Cheap and easy fix. :worthy:

Try a search on 2000 clutch upgrade, or something similar.

  • DrThumper

Posted December 07, 2006 - 12:43 PM

#4

If its the 2000, you definetly want to do the 2001 Mod...I did it and it made a HUGE difference! The wrong oil (oil w/ "Energy Conserving" additives) will destroy your clutch, making it grab like a whore on drugs!

  • Kyle Prior

Posted December 07, 2006 - 04:33 PM

#5

Hmmm, maybe thats why my clutch was so crappy for the longest time. I just replaced it, and it definately is a hell of a lot better now.

  • Gerry B

Posted December 07, 2006 - 06:31 PM

#6

what parts do you need to do the 2001 clutch mod?

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  • grayracer513

Posted December 07, 2006 - 06:49 PM

#7

From a 2001 YZ426:
8 of #7
8 of #8
1 each of #'s 12, 13, and 14

http://parts.yamaha-...ifx?d=32534,2,0

  • moto2000

Posted December 07, 2006 - 08:15 PM

#8

All you really need to do is replace inner most friction disc with #12,13 and 14. Your engagement point will change slightly (closer to bar), but after a couple rides it will seat in and return to normal.

It will make a big difference.

  • grayracer513

Posted December 07, 2006 - 09:51 PM

#9

All you really need to do is replace inner most friction disc with #12,13 and 14.

That's true only if your existing plates are in good condition.

  • moto2000

Posted December 08, 2006 - 06:20 AM

#10

That's true only if your existing plates are in good condition.


Well, that goes without saying. You made it sound like he needed a complete clutch pack to improve his clutch....not necessarily so....

I guess I was responding to the thread starter. It was mentioned that his buddy put in new plates, I think.

There were many changes to the clutch 2000 vs 2001 (actuator arm, push rod, ball bearing etc.) . It can all be changed, or just those 3 parts, and get about the same result.:worthy:

  • mark63

Posted December 08, 2006 - 07:13 AM

#11

Thanks for all the info:applause: :D
I am not sure if his bike is a 00 or 01 YZ. I know he is using similiar oil to me, semi synthetic. He works away for two weeks at a time, but will email him about the mod and all your info:thumbsup: :worthy: .
Where the WR's different?

  • grayracer513

Posted December 08, 2006 - 10:13 AM

#12

Well, that goes without saying. You made it sound like he needed a complete clutch pack to improve his clutch....not necessarily so....... It can all be changed, or just those 3 parts, and get about the same result.:worthy:

And you're absolutely right. The only reason I brought it up is that even later clutches that did not have the grabbing problem built into them can and do develop it due to other wear conditions. But it is true that there's no harm in trying it your way even if the original clutch plates appear questionable, since all you would need to do would be to add the remaining plates to the stack. Your approach could potentially save an unnecessary expense.

  • David37

Posted December 08, 2006 - 08:16 PM

#13

I would also check your clutch basket to make sure it doesn't have any ridges that would cause the clutch plate tabs to hang-up/grab.





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