Just finished rebuilding this.
was seized solid, piston stuck in barrel, soaked in freeing oil.
Knocked piston out with a piece of wood and a mallet.
Rings jammed in grooves, broke when removed, used old rings to clean grooves.
Reworked transfer ports etc.
Embrayage wrong direction, managed to find correct assembly.
Fitted new clutch segments ok.
Engine is on its original subframe with a transfer box underneath.