Is Gasket sealant necessary?

[hublake]

I am putting my 125m motor back together after having to split the case to fix a transmission problem. I have a new gasket set and am wondering if a gasket sealant is necessary? If so what is best to use?

[Gripit'n'ripit]

I do not believe it is necessary. Most of my manuals don't even mention or suggest it.

[dougspcs]

Not if you use good gaskets, unless it's a cover you might want to remove again like the clutch or CDI
cover. For this application I like a thin layer of grease to keep the gasket from sticking.

There are occasions I like to get gasket adhesive..spray it on the gasket and cover to stick the gasket so it doesn't slip out of position during assembly.

[yaegerb]

Gasket sealant is necessary where your manual tells you to use it. I recommend Hondabond HT.

[adcotton]

or in areas where any pitting or galling it present ( somone prying cases apart with flat heads etc.)

Give it a little flat file and maybe a dab of sealant if you still feel a nic.