I'll translate the last long post:
"Consider that scooters and mopeds are designed for low speeds because speed kills. Going fast on a bicycle is unwise as those frames are not designed like motorcycles.
Note that mopeds run on 50cc motors that require no kind of pedaling assistance so some very bright engineers have solved the problems that we see recur in the 66cc Chinese motors.
My most recent build requires pedaling at start and I find this quite frustrating. Perhaps I shall telephone my lawyer to sue this
The 50cc's will do about 30-35 mph. And don't really have the power to climb up hills.
The 150cc's will do about 50-55 mph and can get up most inclines.
The 200cc's do about 60-65 mph, and can get up most inclines.
The 260 can do about 85 mph and can go up most inclines and is freeway legal.
unscrupulous Chinese motor manufacturer for a product that runs poorly and is inherently dangerous.
They should not be allowed to do business."