How to remove a centrifugal clutch from two stroke engine

[evilball]

So I got this kit. The engine came with a centrifugal clutch and pull start already installed on it. What I want know is this: How the do I remove the centrifugal clutch?

I've looked everywhere and can't find a solid answer.

 

[evilball]

I had another engine of the same type, and I got to the big cylinder in the middle, but couldn't get it off. I tried using a bolt with the same size threads, but that didn't work. Is there another way to remove it?