50cc is typically about 30mph max. 30-60mph is more the 90-125cc category.
Funnily, 50cc scooters/bikes are limited to 30km/h max! It's common to exceed the limit a bit.
How does that work when going downhill?
30km/h at the crest can easily turn into 60+ km/h at the bottom if it's steep.
Of course, the manufacturer knows all the drivers are responsible and follow the law exactly and thus brake to not exceed the speed limit. ;-P
It’s just the legal !important speed limit for 50cc class(“Type I bicycles with prime mover”).
45 km/h I think. 50cc and/or 4 kW depending on type of motor.
But basically with light driver this isn't too hard enforcement.
It might depend on country, but typically it's 30 MILES per hour or 50 KILOMETERS per hour, which are roughly equivalent and match default speed limits on most European roads.