Honda head gasket?

[joshyz125]

How big is the stock honda Head gasket up to mm wise.

the 406 is a 86mm bore
the 416 is a 87mm bore

Will the stock head gasket fit the 87mm bore?

[cals400ex]

the stock sized gasket is made for the stock bore and a 406. for the 416 and larger, special gaskets are made. however, you still can use the stock gasket if you prefer. using the stock gasket will actually raise your compression a bit in the larger bores. i prefer to buy the cosmetic that is made for the specific bore i have though. i just order the thinner one. i have had great success doing this.