Leaking base gasket, need opinions.

[neo31ny]

I did a leak test today and I noticed right away it's leaking out of the cylinder base almost all the way around. I wanted to check with you guys before I go throwing money at it. Should I try torquing it back to specs or do I definitely need to replace the gasket? Thanks.

 

[Wifesblaster]

You can try torquing it down, but it probably will not work. Order an OEM gasket and clean both surfaces really good.

 

[neo31ny]

Thanks for the reply. Upon further inspection it doesn't appear to have a gasket in it at all. I'm surprised at how well it runs for having such a bad leak. I think I have a brand new gasket somewhere. I was thinking it was the metal head gasket for some reason. I'll put a new gasket in and do another leak test and see what she says. Thanks again I:I

 

[Wifesblaster]

Thanks for the reply. Upon further inspection it doesn't appear to have a gasket in it at all. I'm surprised at how well it runs for having such a bad leak. I think I have a brand new gasket somewhere. I was thinking it was the metal head gasket for some reason. I'll put a new gasket in and do another leak test and see what she says. Thanks again I:I

If that bike was running without a base gasket you probably would have detonation issues. I would guess there is a gasket in there.

 

[neo31ny]

Hahaha nope there wasn't a gasket. I swapped the piston and head from my other motor with a freshly honed cylinder and newer piston and put a new gasket in. Now it starts up and idles and will actually rev up now and not bog out and stall. I think I'm getting there.I:I although I think I went from an overbore back to stock when I swapped the piston and head. The piston that was in it had 1.00 stamped on it, the other one had no markings. No big deal either way cause I swapped it as a set. I didn't want to risk mismatching them.

 

[Herpderplol]

Did you leak test after the swap?

That should be done before you even start it up

 

[Wifesblaster]

^^^^^^ What he said.

 

[Blaaster]

Hahaha nope there wasn't a gasket. I swapped the piston and head from my other motor with a freshly honed cylinder and newer piston and put a new gasket in. Now it starts up and idles and will actually rev up now and not bog out and stall. I think I'm getting there.I:I although I think I went from an overbore back to stock when I swapped the piston and head. The piston that was in it had 1.00 stamped on it, the other one had no markings. No big deal either way cause I swapped it as a set. I didn't want to risk mismatching them.

No need for worry here, I double dog dare you to notice a decrease in power.

 

[neo31ny]

No I forgot to leak test before I put it back together. It's been way to hot for me to do anymore work on it lately. Next thing I do is another leak test.