Sixties scoots often are rusty, so the pin gets seized into the post. Making matters worse, it's an awkward angle to get access to pry up the pin and you can hardly see what's going on in the shadow of the pedal.
I've read the old forum threads on this topic... because I was looking for suggestions too. I wanted to share the last-resort method I just used myself, in case it helps someone else down the road.
In my case, I'd already removed the floor rails on this old VBB frame so I had extra room to work below the pedal.
I figured there was rust inside the slot where the pin goes so I hit it with plenty of penetrating oil first and let it sit. I used some heat too to try to loosen its grip.
I wanted to be able to see the underside of the pin and pedal better as I was working as well, so I rigged up like a mini dental mirror tool, with painter's tape to hold it in place on the floorboard/legshield, leaving my hands free, and also used a miner's light for illumination.
I started with trying to pry the pin up from the bottom using an allen wrench/key. I levered it up using a huge screwdriver for even more force. The pin was too bull-headed to budge. I also tried to pull it out from the top with needle nose vice grips. All that did was bust my knuckles and spill a little blood.
What finally worked was... I drilled into the top of the pin using a 3/32" bit, making sure to follow the pin's exact angle down through the post, from 1 o'clock to 7 o'clock, just a little at a time. It's soft so it's easy.
I drilled maybe a 1/4" deep and was lucky not to nick either the post or the pedal. Then with an impact driver I screwed a phillips head steel screw into the pin. The pin quickly loosened up and started swiveling at that point, so I could grab it with vise grips and yank it up.
I'll post up some pics. Good luck with yours.
