I have a 1981 Cb750 i have the tiniest hair line leak of oil on my head gasket, which only causes me issues really, once i have stopped riding my bike and its parked, and leaning it on its kickstand, drips across the base of my engine and onto my shifter pedal. i was just wondering if there is a internal gasket sealing additive i can put in with my oil, to maybe seal it up instead of disassembling my whole engine for the most annoying, but quite small leak of oil.