I made with over 300km, it is not much i know, but it was a test bike from polish reseller names Romet.
I must say i was surprised by the quality of assembling. The quality of the materials was good too.
The engine GY6, is set to use it in a City, on the roads outside the city it was to slow.
Maximum speed was 90km/h on the spedometer, but i think it was rather 80.

The suspension was soft but on the paving stones at the market place in my city i thought that i will loose my teeth...

On the other hand in the city i was always the first who started from traffic lights.

Fuel consumption 3,1l /100km

There some video in Polish...