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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.
Photo by Helmut Koch, Vivid sky with Northern Lights, Yukon, Canada

I haven't been everywhere...
but it's on my list!


Photo by Helmut Koch,
Camping under Northern Lights,
Yukon, Canada



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  #1  
Old 20 Aug 2013
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Oil leak problem.

I wonder if anyone else have problems with the sealent of the valve cover, i have done the sealent now 3 times and its a small leak on the right side in the front. Its hard to tell exactly where it comes from due to the small amount and it only comes when riding. I have taken the head off the last 2 times and cleaned it well before applying the Loctite, maybe making a normal paper gasket is the only way getting it sealed?
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Old 20 Aug 2013
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Can you post a good picture???
Be careful where you use a paper gasket as usually in heads where isn’t one is for a reason.
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Old 20 Aug 2013
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Seems like its somewhere here in the front right side.
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Old 20 Aug 2013
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Stick some masking tape over/along the head joint - the "paper based " type used for decorating etc. Clean the surfaces thoroughly first so that the tape sticks well and it is not stained by existing oil.
Then take the bike for a ride and see where the tape is stained by new leakage; this should give you a good clue about where the leak originates.
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Old 21 Aug 2013
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Using any gasket at all under the rockerbox will alter the clearance for the cam shaft bearings. I would NOT do that under any circumstances. Perhaps some high temp silicon, let it cure before starting.
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Old 21 Aug 2013
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Yamabond 4, I believe. It could be 7 though. One of them is low viscosity so it won't build up. There must be one little low spot in one of the surfaces that need a good liquid gasket to fill and seal.
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