new exhaust questions

[alehman]

I'm replacing the exhaust on my 79 and I was wondering if someone could answer a few questions. When I removed the old exhaust, I don't think there were any rubber gaskets at the mouths of the headers. I might be wrong though--- the exhaust ports in the engine are caked with blackness and I'm not sure if there are/once were rubber parts that have either disintegrated or melted. Are there supposed to even be rubber gaskets, or just well-fitting metal? All I have are half-circle pieces, 2 per header, that form collars under the flanges. Anyone have any good photos/descriptions of how the exhaust is supposed to connect to the engine? My manual doesn't seem to say...

[Hellbilly429]

There definately shouldnt be any rubber in there, would not be able to withstand the heat.

http://www.bikebandit.com/houseofmotorcycles/1979-honda-cb750k/o/m2001#sch37731

Looks like according to this diagram part #3 is a gasket of some sort.

I have not taken my exhaust off before so am not sure if there are supposed to be gaskets in there or not, but I am sure someone else on here will confirm that for you before long.

[Piute]

                         Yes you need A gasket most likely it's copper.(good 1)
 At least I've never had anything that didn't need A header Gasket It's there in pic.(B.B.).
 May wont to use "anti seize" on those nuts(lil cheapo by counter a buck?)

[Half-Caf]

There is supposed to be a copper crush washer for every header. They are round when you first install and the collars that you have "crush" into them forming a seal.
It's recommended that you use a new set every time you take your headers off the motor.
They can be found on ebay for around $5