The mini bike engines do vary in specification from 39cc to 49cc, many with some much larger engines available.
The majority of these mini engines are 2-stroke units and produce around 3.4hp standard on the bargain models going up to 17hp for the racing tuned mini bikes.
As you can see there is plenty of power in these little engines so never underestimate them or you will for sure injure yourself.
Buy a mini engine you’d be happy with not only for its power but its performance too.
and part 2.
Bike dirt mini razor
Like the mini engines? there are some brilliant ones out there such as the 110cc bike dirt mini which has tons of power, or how about something lighter ? the 50cc bike dirt mini moto, should help you with jumps and speed. Some light bikes are much sought after like the 49cc bike dirt mini panterra, or the specialised bike dirt mini razor; fast and powerful for any moto fan.