it depends on the bike, some will only go 50mph, while some will hit 80mph, it depends on the bike.
125cc's go 70-90mph
Depending on make and gearing anywhere from 60-70 mph
well i have an rm 125 and that go's 60 to 75 mph it all depends if it's 2 or 4stroke a 4 stroke has better top end a 2 stroke is quiker out the start but id say 60-75.
Depends on make and gearing from 60-70 mph
A properly tuned 125 cc racing kart will do over 60 mph.
The top recorded speed of a 125cc Moto Gp bike was set by Valentino Rossi in 1996, aboard his Aprilia at 155.193mph.
about 70-75
real fast
55mph
125
45
about 70-75
a 125cc pit / stomp bike can reach limits of 70mph :)
it goes up your *** belive it
50 mph
40mph
It will at least go 45mph
1 km
Depends on what brand but about 45mph