I removed one from an old 1974 dizzy. Total pain in the butt. Grind off a bit of BOTH ends of the pin to remove the part of the pin that was deformed from staking it in. Use a hardened drift as close as possible to the size of the pin and a BIG hammer. Support the dizzy gear on a large vice or anvil so you get a good solid surface to beat against. Start pounding on it. If it doesn't move, switch sides and try again. Careful not to mushroom the head of the pin.