New to this all & doing a rebuild on this 79 Suzuki GS1000L.. getting to the engine and found this inside the cover of my LH crankcase cover. It's a ton of gunk packed on top of what appears to be a foam backing. Definitely corroded/partially melted and needs to be cleaned out, but I cant find any info on it. How to replace it, if that's possible.. what's its purpose.. does it need to be replaced? I'm lost and thought I'd stop tearing this stuff out till I know what I'm dealing with. Thanks in advance for any assistance!