I ordered some carburetor base gaskets from the seadoo parts warehouse and they are very thin. Are the parts that Riva motorsports sells factory or aftermarket parts? My thought was they provided factory parts but maybe I am incorrect.
Those are OEM gaskets and the best you can buy. In my opinion the SBT ones are too hard.
I like to add a super thin coat of 1211. It guarantees a perfect seal and makes removal effortless.