Chinese 70cc's are actually 90cc engines so they have got the power
so good manufactures chinese motorcycles easily go above 80km/h
and they have top speed of around 80-90km/h which is actually normal
top speed and claimed top speed for Pridor 100 which is 97cc
Now slowly slowly chinese manufactures are admitting to fact of 90cc
like now you see 90cc on Union Start US70 motorcycle
How ever this thing was spotted and proved by fellow asjdsm
years ago when he opened his dyl dhoom 70 head
link to his thread