According to the parts listings for that engine on this pg:
http://www.motopartsmax.com/index.ph...engine/paID/46
it looks like it might have the same setup as the Roketa. If it does, it is doubtful that the one way clutch failed from just cranking unless you were keeping it cranking for a long time. I would pull the starter off and see if anything is easily visible.
If not, prepare yourself for engine disassembly by buying the tools and gaskets needed.