I would also like to know, i will be trying to get the exploded piston out of my motor i tore apart the other day.... I was gonna try a shop vac, but tell me some more about flushing it please?
while your at it you may want to change the flywheel side crank seal, if you pull it out you can flush some kerosene through there too, if any thing feels rough your going to need to split the cases and clean/inspect/ replace stuff