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Remove Rocker shaft? Remove Rocker shaft?
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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
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  #1  
Old 31 Aug 2013
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Remove Rocker shaft?
Anyone done this on the 3TB? If iam correct you attach a bolt into the end and use slidehammer pulling the shaft out, is there anything inside that have to be removed before doing this job, except for the bolts holding the shaft? The bolt to fit in the end is a 5mm.
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Old 1 Sep 2013
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Here's a picture of the underside(I haven't seen mine yet), scroll down and there is an underside photo. It does look exactly like my XL and it is just take the pin out of the side and pull out, simple as that. I can take a pic of my spare to show how it is if needed. But I would just pull that puppy out .
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Old 1 Sep 2013
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I know what it looks like, have taken off the cover several times as i explained in the other thread. The qustion is do i have to remove any washer? For me it looks like remove the bolt holding the rocker shaft and pull the shaft a little out to replace O-ring?
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Old 2 Sep 2013
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no washer, just pull it out.

interesting, the link was removed from earlier post.
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Old 2 Sep 2013
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1993 Yamaha XT600EE Valve | Yamaha Sports Plaza

Nr 20 is washer on the rocker shaft, i quess they are not removeable before shaft is pulled off?
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Old 2 Sep 2013
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Those washers are slid over the shaft on each side of the rocker to keep it centered, they are a curved or wave design to put side pressure on the rocker. They just slide on the shaft and don't come out till the shaft is out. Now I see why your questioning this, your probably wanting to do this without removing the cover, I would try it, but take the inspection plug off right in front of it and maybe have someone reach in with fingers and hold the rocker toward the washer to keep it pinched(my Hondas wouldn't come out unless the rockers were pryed out). If you only pull the shaft out enough to replace the O-ring , I would be willing to bet it'll stay right where it is and you'll have no problems.
If it falls out, the rocker will move side to side and you'll be able to check for that, if it can't be seen.
I can take some pics of how that setup is in pieces(the Honda version but identical) to show what I'm saying.
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Old 2 Sep 2013
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Maybe the long rear shaft can be done with cover on, but mine is leaking in front and as you see bolt 17 has to be removed first.
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Old 2 Sep 2013
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Ah , that one has that lock bolt inside. Yep.
Make a cap with an O-ring and bolt it to the end of the leaking shaft to seal up the outside. Have to seal the bolt going through the cap also. Then you don't need to change the other o-ring or take the cover apart till needed for something else. It would be easy at least for me as a machinist, and stainless !
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Old 2 Sep 2013
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Yes i dont understand why they didnt make a cap outside in the beginning, would be so easy getting this seal changed. Iam taking off the cover doing this correct, waiting for all seals to come.
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Old 16 Sep 2013
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I have changed the O ring seal and still i get oil coming out from that FU.... hole, 4 times i have done this job now.. Its only on the right side the problem is, its not much but after an hour riding you can see oil outside on the engine. This time the seal was on for 3 days before use.
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Old 16 Sep 2013
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Your going to have to plug up that pesky oil feed line going up to the head and run her dry.
Oil is over rated anyways.

Did the new o-ring fit tight or get shaved off a bit when reinserting the shaft? Maybe need to find a bit bigger(diameter) o-ring to squash it more. The shaft doesn't turn so it's just a matter of cramming it in there to begin with. Or maybe run 2 of them.
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Old 16 Sep 2013
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Nothing wrong with theO ring i removed, there is no room for more than one of these in the gap. Maybe i could fill the gap with the sealer before i fit O ring. There is something strange about that right side, all other seals are ok. I think i have to live with the oil problem, its no fun anymore taking apart all the parts to do this sealing...
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Old 17 Sep 2013
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I was thinking about the pressure, maybe i have to much pressure in the top causing this problem with oil. Its limited amount of oil in the top cover, and there shouldnt be to much pressure making the oil come out. The hoses coming from engine seem fine.
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Old 18 Sep 2013
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There should be plenty of other places to leak if it's a pressure thing other than that o-ring. It's kind of away from any flinging oil, plus the shaft doesn't even move, so the oil shouldn't be able to work its way past. Just a strange symptom.
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Old 27 Sep 2013
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Seem to have got it sealed now, used Loctice 5910 and new O ring. I dont recomend the Loctite 5926, and be reeally carefull when install new O ring.
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