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Post by strick on Jul 24, 2008 9:25:30 GMT -5
I have an aftermarket header and supertrapp pipe. I also have the torque insert in the header. I am on my 3rd try to get the pipe sealed. I did have to shave the stock gasket, which looks like an aluminum swirl, to be able to allow clearance for the insert. I also use lots of copper hi-temp RTV. Has anyone just used RTV and left the stock gasket out? OR, is there a replacement gasket out there that is different that the alumimum one.? In all my years of car/motorcycle repair and restoration, I have never seen an exhaust gasket like the one on this bike.
Thanks!
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Post by StewRoss on Jul 25, 2008 17:32:22 GMT -5
With the insert in there (...and depending on the thickness of the flange around the insert) you may have to fit longer exhaust studs to have enough thread to clamp it all up... SR  |
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Post by yamatopdog on Aug 1, 2008 20:39:43 GMT -5
Strick i have had very good luck using Harley gaskets, they are a metal mesh and are ez to trim w/ apair of sisssors,
hope this helps,Bob
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Post by manxman on Aug 4, 2008 20:12:10 GMT -5
I'm sure mama Yamaha had good reason for using studs on the head pipe attachment? But, I'm looking at a similar situation to Strick's and wonder why bolts wouldn't work? In particular, 8mm stainless socket head. Any opinions?
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Post by solo2racr on Aug 4, 2008 21:21:59 GMT -5
Bolts are fine. Put a Helicoil in the head first. And use a copper base anti seize compound.
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Post by manxman on Aug 5, 2008 9:03:38 GMT -5
Bolts are fine. Put a Helicoil in the head first. And use a copper base anti seize compound. Why the Helicoil Ken? |
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Post by solo2racr on Aug 5, 2008 11:07:07 GMT -5
Bolts are fine. Put a Helicoil in the head first. And use a copper base anti seize compound. Why the Helicoil Ken? The cast aluminum isn't all that strong. One, it's cast. two, it's aluminum. What the Helicoil will do is save the wear and tear on the aluminum. The aluminum will "see" a much larger bolt as the Helicoil will spread the load out over a larger area. Also, steel directly onto aluminum has a tendency to seize. Particularly in a area that is as hot as an exhaust header. I have broken off steel exhaust studs that were frozen in the aluminum head. It can be that bad. This is also one reason I will NEVER use a Champion spark plug in anything with a aluminum head. Whatever they use to plate their plug bodies (zinc?) with really hates aluminum. Both NGK and ND use something to plate their plug bodies that is rather friendly with aluminum. The reason for the copper based antiseize is because it has a much higher temp rating than the aluminum based antiseize. I wish someone had told me about these thing when I first started working on race bikes and later race cars. As much as those things get torn down, little things like this can be a life saver when your under the gun to get something ready to race or worse, having to do a repair at the track. |
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