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  1. #1
    CB750 Enthusiast mnvkngs65's Avatar
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    cylinder base gasket - gasket sealant?

    Finishing the upper motor rebuild on my 73 cb750 and am a little nervous about the final steps failing (i.e. gasket leaks).

    I have a KP gasket set and was wondering if I should use any type of gasket sealant on the cylinder base gasket? The online company I bought it from advertised it does not need it so I'm inclined not to.

    Also, I purchased new APE cylinder studs and plan to torque them down to their recommended ft/lbs and then loosen them and retorque as many suggest.

    Do I need new nuts for the studs or can I use the old ones?

    Thanks for any help.

  2. #2
    Moderator dirtdigger's Avatar
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    if the surfaces of the block and cylinder are clean with no nicks you shouldnt need any sealant. I tend to use Copper kote on the gaskets and have had no issues. Dont use silicone or RTV anywhere on these motors. Hondabond or equivalent or Copper Kote on certain gaskets. Pay attention to the head gasket material and quality. I only suggest using the graphite type material head gaskets. Many of the aftermarket head gaskets are a cheap hard gasket material, I have used them and they all leak at some point no matter what you do to them. For stock rebuilds I only suggest OEM honda or Cometic graphite head gasket.

    You can use the original cylinder nuts no problem with the APE studs.

  3. #3
    CB750 Enthusiast mnvkngs65's Avatar
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    Dirtdigger, Happy New Year and Thanks!

  4. #4
    Moderator dirtdigger's Avatar
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    No problem. Happy New Year to you as well.

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