1075 copper gasket?

I have a wiseco 1075 kit with 10.25 compression. The kit comes with a fiber head gasket, which has worked great. The problem is that its one time use.

Now, Cometic has a two piece copper gasket for that size bore(which is 72mm). Has anyone used a copper gasket with a 1075 kit in their KZ? Does it work good, leak oil?

Also, how reusable are they?

copper gaskets normally leak like a sieve unless the top of sleeves is o ringed;)

did you say 2 peice copper ? with an oring in the middle?I'm thinking that might work .I know from experiance that the one peice copper head gasket leaks oil around the cam chain valley,and no amount of silicon seems to cure it.it seemed to hold compression[ 12/1], just leaked oil badly. I went back to a one peice fiber and cured the problem.

did you say 2 peice copper ? with an oring in the middle?I'm thinking that might work .I know from experiance that the one peice copper head gasket leaks oil around the cam chain valley,and no amount of silicon seems to cure it.it seemed to hold compression[ 12/1], just leaked oil badly. I went back to a one peice fiber and cured the problem.

did you say 2 peice copper ? with an oring in the middle?I'm thinking that might work .I know from experiance that the one peice copper head gasket leaks oil around the cam chain valley,and no amount of silicon seems to cure it.it seemed to hold compression[ 12/1], just leaked oil badly. I went back to a one peice fiber and cured the problem.

PLUMMEN wrote:

copper gaskets normally leak like a sieve unless the top of sleeves is o ringed;)

Yep. Had the exact same experience with my 1260.

Per exhaustive Z1 history in file base --

The 1 piece head gasket first used on Z1 was changed to a 2 piece version on late 73's and became standard on 74 models with taller cylinder head nuts.

I believe the rubber o-ring between the two halves sealing off the cam chain tunnel was also introduced with the 2 piece head gasket.

Get another Cometic gasket.Graphite if you
can,fibre if you can't.If you run the copper
it will just be a matter of time untill it
leaks.Have your head checked for flatness,
have it skimmed in a mill if it shows ANY
warpage or dips across it.

tjettim wrote:

Get another Cometic gasket.Graphite if you
can,fibre if you can't.If you run the copper
it will just be a matter of time untill it
leaks.Have your head checked for flatness,
have it skimmed in a mill if it shows ANY
warpage or dips across it.

done and done. Thanks for the help guys.

Nephlyte wrote:

Now, Cometic has a two piece copper gasket for that size bore(which is 72mm).

Also, how reusable are they?

Cometic only shows 71 and 74mm 2 piece copper in the 07 catalog. Maybe they have 72 on their website.

We generally recommend copper only when cylinder pressure is too high for the fiber gaskets.

Jay

Post edited by: APE Jay, at: 2007/08/06 21:10

they are reusable after you anneal it

they do leak if you don't use gasket cinch be sure to let the glue dry before installation

good O rings are necessary as well

I love copper and use them a lot over and over
even if they do leak a bit