OEM paper cyl base gasket

[xlfan]

Has anyone got a magic formula for a liquid that can dissolve this base gasket besides harsh mechanical removal with the risk of damaging the cylinder base gasket surface?

[rigidthumper]

Sometimes you can soak them in Knock'er Loose and then scrape with a plastic blade.
Sometimes it's easy, sometimes you wanna buy a lathe so you can machine that stuff off  .
(I bought the lathe)

[SP33DY]

I tried a few things that didn't work!

 Now when I get an Evo cylinder with baked on gaskets, I use a mandrel to hold the cylinder in the lathe and carefully skim it off. Often when I do this I find out that the base is no longer flat. There are areas that didn't "clean-up" once the gasket is mostly gone. It usually only takes a skim of a few thousandths of an inch to restore the whole base to flat. It's faster to do it this way than with the old Trock lapping plate. Going back together, I like to install oil drain pigtails (V-Twin 16-0912). To tap the drain hole I use a spiral flute "drill tap" (McMaster Carr 3464A21 or 2748A47). The drill tap is a close fit in the hole so the tapping operation is straight.

drill tap 1

drill tap 2

[SixShooter14]

I tried a few things that didn't work!

 Now when I get an Evo cylinder with baked on gaskets, I use a mandrel to hold the cylinder in the lathe and carefully skim it off. Often when I do this I find out that the base is no longer flat. There are areas that didn't "clean-up" once the gasket is mostly gone. It usually only takes a skim of a few thousandths of an inch to restore the whole base to flat. It's faster to do it this way than with the old Trock lapping plate. Going back together, I like to install oil drain pigtails (V-Twin 16-0912). To tap the drain hole I use a spiral flute "drill tap" (McMaster Carr 3464A21 or 2748A47). The drill tap is a close fit in the hole so the tapping operation is straight.

drill tap 1

drill tap 2

Exactly how I did it after a few days of wrestling with plastic razor blade scrapers and carb cleaner, it went on the lathe.