Topic: Bike heals its own leaks after top end redo - am I dreaming?

[gpzkat]

Two bikes I've worked on lately including my CB750 (other a GS Suzuki) have had me really worried, as I've seen some oil weeping after the first startup. Then the leaks have stopped. Does it take a couple of heat cycles for the gaskets to seal up?  It makes sense to me, just wondering if others have this experience.  I also had float levels to fix, and did so. Now all leaks are gone, not a drip anywhere.  Not complaining just curious, and who knows what the future will bring.

[Alan F.]

Could just be gaskets soaking up some oil or a few heat cycles having a sealing effect.

Paper gaskets? Or other material? I have some oem gaskets for my 93 CB250 NH that are made of a green material, the surface is textured. The old gaskets were really tough to scrape off as if the green material bonds to surfaces with heat cycles.

[gpzkat]

Yeah, makes sense, I just didn't expect so much leakage, they are Cometic standard type gaskets.  Probably because both oil and carbs were weeping, made me gasp in horror and clutch pearls LOL.

Could just be gaskets soaking up some oil or a few heat cycles having a sealing effect.

Paper gaskets? Or other material? I have some oem gaskets for my 93 CB250 NH that are made of a green material, the surface is textured. The old gaskets were really tough to scrape off as if the green material bonds to surfaces with heat cycles.