Look what i found...

[trailrider894]

So, I found a copper head gasket for the 400ex. It was on ebay, just search it. Ebay links don't tend to work on here. I wonder whether that would really seal correctly. They claim it would never blow out?

[400exrider707]

Why? Never had an issue with OEM Honda gaskets or Cometic gaskets...

[trailrider894]

Originally posted by 400exrider707
Why? Never had an issue with OEM Honda gaskets or Cometic gaskets...

I just stumbled across it, i have no intentions of buying one. It is geared towards the big bore guys. Like someone running a 440 with a higher comp piston. It claims it never blows out.

[hocman123]

most older bikes have copper gaskits. i have a 78 yamaha rd 350 2-stroke it has 2 copper rings for the head gaskit.

[Honda#4]

Copper would create a better seal since copper is such a soft metal so I could see that working.

Why do you think theres copper crush gaskets for the exhaust.:ermm:

[CJM]

Reason we dont see it being widely used for headgaskets anymore is modern gaskets have come a LONG way. Every car, truck, bike and atv these days have an advanced manufactured gasket of some kind.

Plus copper is $$$

[400exrider707]

Originally posted by CJM
Reason we dont see it being widely used for headgaskets anymore is modern gaskets have come a LONG way. Every car, truck, bike and atv these days have an advanced manufactured gasket of some kind.

Plus copper is $$$

Exactly the point I was trying to get at! :)