If you search under calcutta supertune I think there is a thread where a guy shows how to make a tool to push that pin out, or I suppose you could just drill a hole in a block and use a small drift pin to tap it out while the block supports the shaft.
Nah that is not it. But here is the link on supertuning that may interest some.
http://super-tuning.home.mindspring....ex%20page.html