My friend Bogi (Leyte) said he thinks this bike is an early 70s model ... Pretty unique in a few ways for its day - Shaft drive, single rear shock, oil pump, auto-clutch, no transmission, single-sided swing arm ..
Pretty sure it's the PW50 engine as it looks exactly the same as my 5 year old grandsons. Left hand kick starter, shaft drive, and all. The 80 is right hand kick and chain drive.
HA I only had to step into the garage . He scares the crap out of me on that thing. It flies with his light little butt on it and that with it governed down !