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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!
103596
 

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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! View attachment 103596
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! View attachment 103596
Hello Christian, We're building a pair of 1982 GS1100E to vintage race. What you are looking at there is the cover for the drive sprocket. On our race motorbikes we leave that (because it's so heavy) off entirely. It is replaced with a support for the splined shift rod and a thin aluminum plate to protect the electrics. I believe that all that insulation is only to keep down some of the noise caused by the chain and sprocket. That whole area get inundated with chain lubrication over the years and the insulation just drys out and becomes brittle. If it were me I'd either just clean it up and put it back on or try some of that quick drying rubber that you see on TV and just patch it. Should cause you no trouble one way or the other. You may also find a replacement fairly cheap on line. I have some from our racers that I have chucked in the bin so they're not a hot commodity. Cheers
 

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Rich thank you so much for pointing me in the right direction. Think I may try going with the rubber and see how that works out. You're the best!
 

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;) for future reference, best not to refer to the broken chain cover as the crankcase cover, it makes people get all worried. Crankcase is suppose to be full of engine oil not foam insulation.
 

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;) for future reference, best not to refer to the broken chain cover as the crankcase cover, it makes people get all worried. Crankcase is suppose to be full of engine oil not foam insulation.
Gotcha and thank you for the advice. I appreciate all the help I can get for sure.
 

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I hear acetone will dissolve styrofoam,
but considering the toxic chemical combination might warp your babies or combust handle it carefully.
 

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and you know nail polish remover is mostly acetone
Christian, Rich here again. Don't spend too much time worrying about this thing. That rubber s%*t sticks to almost anything. We keep it in the race trailer just in case. Clean off the loose stuff wipe it down with acetone and take a putty knife and; thinking cream cheese and beagles, just smear it on. Work it into the low spots and you're good. All you really want is to stop all that loose grott from contaminating you floor and drive.
Cheers
 
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