The top speed for a Kawasaki KX125 is about 70 miles per hour. That would be the speed with a 150 pound rider.
the top speed on a xr80r is about 35mph
the top end speed is 65mph.
A 70cc dirt bike will achieve a top speed of around 40mph
80mph
25-27-mph standard top speed for a mini dirt bike
65-75
120 mph
50-60mph
A 125cc dirt bike generally hits a top speed of 60 mph. Consider this a top speed when racing Motocross or riding trails on a hardpack straightaway - the ideal setting for a dirt bike. However, if you must, on paved roads expect to hit close to 70 mph.
A 70cc dirt bike will achieve a top speed of around 40mph
50-55mph stock
the top speed of a 150cc dirt bike can depend on a lot of things like if its a 2 stroke or a 4 stroke engine what kind of terrain your on and how much you way but the average is about 50-55mph