The right side cover comes off with screws, since the long bolt is already gone.
If you look really close you can see the threads inside rocker arm pins.
I forgot the thread pitch, but at this point plenty of bolts are laying around. The footpeg mount bolt fits.
Screw it in and pull it.
Okay, I should have pulled the tappet adjuster screw and lock nut, before the rocker arm pin, but it still comes apart okay.
Now the valve spring compressor.
When the spring pressure is off, then the keepers come out.