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Mr426f

Shift paw

11 posts in this topic

I will include a pic, but i have a yz426f 2002 im rebuilding got stumped on the shift paw, theres a little dot on the rim of it what postion does it suppose to be in? And is the stopper lever suppose to sit in this groove?ImageUploadedByThumper Talk1466097979.576941.jpgImageUploadedByThumper Talk1466097998.755712.jpg

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Clockwise from that dot is 1st gear, counter from there is 5th.  Just a reference for assembly purposes, the shift pawl doesn't get timed to it or anything, and there's only one way you can assemble it.  The stopper can sit anywhere it will.  Right now, it's in neutral, as witness the stopper sitting in the "half depth" notch between 1 & 2.

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On so that half moon is neutral so when i try to shift through the gears it doesnt pop back to original position

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The only way you could shift it as it is pictured is to grab the end of the shift cam drum with a pair of pliers and turn it while rotating one or other of the trans shafts.  What doesn't pop back into place?

 

Bumping topics isn't allowed, BTW.

 

One thing you might be running afoul of is that there is a locating pin on the end of the shift cam that indexes the shift segment (the part the stopper lever runs on).  If you get it assembled without the pin being in place, you'll create a problem for yourself that you don't want.  You won't get gears engaging where the linkage thinks they should and other problems.  Plus, you can push the pin down flush with the cam surface so that it never works again and end up pulling the shift cam out of the trans to fix it.  See picture:

 

 

camseg.png

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Have everything on right with the locating pin but when i assemble the shifter and try to shift through the gears the shifter doesnt pop back

Forst few gears it will but upper it gets stuck?

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The shifter shaft is recentered by the centering spring (12).  In order for this to work, the shift shaft must be able to move the shift pawl lever (16) freely back from the shifted position to the centered position.  You need to determine what it is that is hanging it up from doing that.  Since it is only in a certain one or two gears, shift to that position, remove the main shift shaft, and operate the pawls and pawl lever manually.  The pawl lever (16) pivots on the peg extending from the segment retaining bolt (not numbered), and if it hangs up or binds with the shift cam in one position but not others, it leads me to think that the segment is not squarely positioned on the shift cam, despite your statement otherwise.

shifter.png

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Thanks man, was very helpful, i had a no brainer moment number (14) wasnt installed and once i installed it it played a very important role in the spring back action! I was just seeing if everything was working correctly before i closed everything up but thanks again [emoji106]

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Yeah, I saw it was missing, but I didn't think about you trying to work it that way.  Without it the opposing pawl engages the cam segment and tries to shift back to where you were. 

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Should i be able to get in 4/5th gear with just shifting through them on work bench?

Edited by Mr426f

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Yes, but you will have to spin one of the shafts and perhaps hold the other to get the gears to line up. 

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