You would fit, but if you're still growing, I'd recommend a bigger bike such as a 125cc. If you're stuck on two stroke bikes (like me) then you should buy a used 85cc because you will grow and need to switch to a 250cc in about a year.
around the 65 mph mark for a big wheel kx 85
i have a ktm 85sx and a kx 85 small wheel. i am a midgit but i can ride them. i am twelve. this should help. a kx 85 big wheel is an awesome bike. although if he or she is small it will be too big. a ktm big wheel is expensive but is worth it. it is still quiet big. these are some seat heights kx 85 = 840mm ktm 85 sx = 850mm rm 85L = 850mm cr 85 = 860mm yz 85 = 840mm but all these are ajustable my bros 14 and he rides a ktm 85sx big wheel. he is 170cm tall.
a kx 85 with a pro circuit pipe on it runs in between 70 and 75 it is a pretty fast bike stock two it runs about 68-70 stock but a perfect bike for a teen about 5 ft to 5ft 4
A KX 85 STOCK WILL TOP OUT AT ABOUT 68-70MPH. well mine will top out at 85mph cause its no normal kx 85
One has big wheels haha
you can ride a kx 85 any age there is no lmit :D
At least 4''10 to 5''11
my 99 model kx 250 does 85 mph
about 90mph :)
The kx 85 is over all faster......but the 150r would give it a run for its money