the only motoplat I've messed with is on a sachs 504 It uses the small bosch puller.
I remember reading in a moped repair book that bosch,
CEV and motoplat can be interchanged. I imagine it would depend on the size and set up.
You can't get to the strator plate screws thru the windows in the flywheel?
You could also adjust the timing the old way- bending the points.