Looks like you could just take a good cutting saw and cut the sprocket off right behind it. There is room between it and the bearing surface. The thickness of the saw blade would be compensated for by the backing plate.
Yep, it looks pretty easy now. Just having a good cutting saw (diamond bladed lab saw would be nice!) and some decent fabrication. I'd definitely be interested in building another N/A motor if I could have these on it.
I keep on thinking I could build the ultimate high compression 3L the second time around.

Oh the dreams, and the money.
Tom