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yz426 Tranny Problems! HELP

This is a discussion on yz426 Tranny Problems! HELP within the 4-Stroke Motorcycle Knowledge Base forum, part of the Motorcycle Knowledge Base category; Just looking for someone to give me some info on my 02 yz426. When I shift into 5th gear, it ...

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  #1  
Old 10-24-2004, 07:57 PM
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Angry yz426 Tranny Problems! HELP

Just looking for someone to give me some info on my 02 yz426. When I shift into 5th gear, it slips a couple quick times before taking on off. Has anyone had this problem before, or maybe know what is going on, before I tear into it. Thanks
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Old 10-24-2004, 08:07 PM
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Default Re: yz426 Tranny Problems! HELP

You have just become a member of the "blown 5th gear club". You will need to tear into it. Not an easy job but it's doable.

Do you have a magnetic drain plug? If you do I promise you there is a piece of your 5th gear on it!

Pull it apart and inspect all of the gears. You want to look closely at 3rd and 4th while your in there and if they look worn replace them.
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Old 10-24-2004, 08:10 PM
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Default Re: yz426 Tranny Problems! HELP

Yep, welcome to the club of the 426 5th gear breakers. Sorry about that man... it was Yammies fault for not doing better testing and inspection. Best of luck to you.
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Old 10-24-2004, 08:17 PM
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Default Re: yz426 Tranny Problems! HELP

I am so slow mine has never seen 5th gear! LOL
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Old 10-24-2004, 08:27 PM
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Default Re: yz426 Tranny Problems! HELP

Found this on another site:



Here is your problem.
This was my 3rd gear. as you can see the the wheel has round edges and that causes it to try to push the fork away. That«s why it feels like it is slipping, that is everytime you deliver throttle and power enough for the wheel so that it can«t hold its position. Just replace the shift fork and the two wheels that are supposed to be held together when 5th gear is engaged..
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Old 10-25-2004, 10:56 AM
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Default Re: yz426 Tranny Problems! HELP

That is exactly what happened to mine!
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  #7  
Old 10-25-2004, 12:44 PM
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Default Re: yz426 Tranny Problems! HELP

Wow, good info here guys, possible KB canidate?
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Old 10-25-2004, 05:45 PM
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Default Re: yz426 Tranny Problems! HELP

Possibly....that way I can find i when I blow mine up! LOL
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Old 10-25-2004, 09:51 PM
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Default Re: yz426 Tranny Problems! HELP

Thanks, you all been very helpful!!!!
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Old 10-27-2004, 09:54 AM
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Default Re: yz426 Tranny Problems! HELP

Looks like it's here now.
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