Uhhh....I don't think the piston/rod assembly is disassembled at all. Looks like everything is where it belongs except off course for the flywheel. How in the world did he manage that?!?! I've seen the recoil on the bar side, but this? Maybe it's a special 'twin-recoil' model.
Clearly, this guy wanted an interesting saw rather than a functional one.
Excellent 100 yd. medium bore rifle target. Wounds don't count, you must place the shot so as to ruin the crankshaft, crankcase and cylinder, bonus points for ignition, flywheel and carb.