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2010 Problem (cam cover leak)

By aedwards07,
in YZ400F/426F/450F/450FX

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gfmoto

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Just wondered if more bikes leaked, or if it was just a few.. Good that fixed ones still dont leak.

so are you in the south of sweden? It seems a bit early to be riding that far north unless its indoors or in the snow?? Just curious as I have spent some time in Stockholm

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Enthusiast

Skotten

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We do have an indoor track, which I tried out for the first time lastnight... Hard packed clay, small, tight, mini supercross track. Needless to say the 450 was too big too over powered for that track I hurt myself a bit. But the bike lives on

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  • 2 months later...
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moto278

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i have 22 hours on my bike. no leaking yet. i know the hours very. out of curiosity. i kno the ppl i ride with and around here hate warming up their bikes before riding. i always warm up the motor before riding. are people with their gasket leaking warming up the motor or runnin it cold? i think i read on here that running a cold motor can lead to gas leaking into the motor and into the oil. just a thought and see what ppl on here do with there bikes

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Experienced

rickallen124

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Went through another one today.Great.haha.So I guess I am going to try to add a hole inbetween the 2 chambers in the head cover and put a new gasket in and see if that works better.Cant be much worse.

Man, that sucks. Is that the 3rd one now? I hope that removing material from that bridge works. Let us know if it does.

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  • 1 month later...
Grand Master

aedwards07

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Blew another one today.I have the bridge hollowed out to help relieve pressure also.At this point its getting beyond ridiculous with these things.At least I picked up a few of them at Lorettas a few weeks ago.Should be set for another 2 months or so.

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Apprentice

220 Off-Road Tours

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I had 2 of these go out. I tried a few things when I installed the 2nd one and those did not work. But here is what did: Yamaha mechanic suggested that I use a few drops of superglue to hold the gasket in place in certain areas of the cover. So I put a few around each corner, in the section where the half moon shapes are and especially a few aournd the spark plug hole area as that is where my 2 previous gaskets had torn. Yamaha told me that it appeared to be some slippage or movement of the gasket causing it to tear. With this new superglue technique I have got about 80 hours on it now and several oil changes and extensive riding and no issues. I was holding off on posting this because I wanted to make real sure it was fixed and it appears to be fully resolved. I noticed that yamaha was also extended a leash portion of the gasket to connect both sides of the spark plug gasket area to increase the support. This was done on my second gasket but I cut if off thinking it should not be there since the original did not have it. Now I know it was meant to be there to help resolve this issue.

Good luck and hope this solves this issue for everyone!

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