Magic Motorcycle cranks

[Unovis]

Recently picked up a Kestrel off my local Craigslist for cheap and was surprised to learn that the funky purple anodized crankset on it was an original Magic Motorcycle crankset... Since I tend to be a little rough on bikes and the conditions in my area aren't the best, I'm thinking about removing the cranks before I mess them up- they're in really nice shape.

I know the arms are self-extracting, but does anyone know what tool I'll need to remove the bottom bracket cups?
Thanks.