how do you know
I bought a gasket set from CycleX... here's the blurb direct from their website:
"Cycle X gasket sets are better!!!!!!!!! Honda CB 750 SOHC.
Athena gasket sets are missing the "o" rings for the valve inspection covers.
Vesrah gasket sets are missing the 6 cam tower plugs ( quarter size plugs under the cam tower )
Our gasket sets are COMPLETE, with all necessary gaskets and "O" rings for a rebuild. ( oil seals are separate )
Cycle X head head gaskets have a bigger fire ring around the combustion chamber ( that's good )
Cycle X head gaskets are made with metal layers and impregnanted with gasket material to resist the need to re-torque ."
What they don't say is that their gasket set is EMGO, ie cheap Taiwanese paper. I figured if I spent $80 on it I might as well install it and see if maybe they're right and I misjudged the quality. Nope, leaky headgasket and leaky valve cover. Going to replace with either Cometic or OEM over the winter. Not looking foward to pulling the engine
again.