A 4-stroke 125cc motorcycle typically reaches speeds between 60 to 80 mph (96 to 128 km/h), depending on factors such as the bike's weight, design, and gearing. Performance variations can also occur based on the rider's skill and the riding conditions. Generally, these bikes are popular for their balance of power and efficiency, making them suitable for both beginners and experienced riders.
real fast
55mph
about 70-75
45
125
a 125cc pit / stomp bike can reach limits of 70mph :)
A 90cc are 125cc 4stroke
40mph
50 mph
it goes up your *** belive it
1 km
Depends on what brand but about 45mph