Moped Army

When I try to pedal start, the pedals turn but neither the rear wheel nor the engine turns. I think the mechanism called "free wheel", which makes it possible to pedal forward but allows you to coast or pedal backward without being connected to the wheel, somehow broke.

Mine is a Jawa 130 (210). If you have had a similar problem please let me know how you solved it. Right now my options are replacing the entire rear wheel or replacing the freewheel only. But probably I won't be able to get a freewheel that fits.

Thanks,
Masa