Honda CB750 Sandcast
General Category => General Discussion => Topic started by: Don R on November 02, 2016, 01:01:30 pm
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Is there a source for proper head gaskets for an early head? If I were to contact cometic about making some I'd assume I need the thickness and composition information. Not having one for comparison I wonder how close the rest of the gasket is besides the center bolt?
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Other than the extra hole at the front the other bolt holes are smaller in diameter. The newer gaskets also have a sticky area between cylinders 2 and 3 to help with sealing which was a good feature.The early production gaskets didn't have this. I'm sure you would get a lot of interest if these were remanufactured
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the sticky head gaskets make head removal a horror. the issue of preventing oil leaks is as much in the thickness of the head gasket
as it is in the thickness of the O-rings fitted. i've started using Vesrah head gaskets and a slightly thicker O-ring and had no oil leaks running the engine on the test stand and during operation in the frame. i don't have the thicker O-ring measurements as i write this, i do have the measurements at my shop.