I had to do some repairs on this bike and could find almost nothing online.
I figured a post here would at least give a person repairing one of these bikes a contact source.
98 cc, 2-speed
Iconic 'fishtail' muffler
Dry clutch with round cork insert linings (you can make these yourself)
spring loaded shifter 'brake-style' lever to a single cable shifter config
(3) 49x2.0mm rings (that I could only find in Greece)
2-wire light switch (I converted to 1 wire and grounded some things)
Can be run with well greased trans gears (original) or some SAE oil if you seal the cases.
DO NOT take the external shifter levers off unless you want to split the case to re-install. Use a fairly stout spring (or one inside of another) to push the shifting configuration through N and 2nd. (edited)