At least 4''10 to 5''11
umm about 5"4" at least
There is not a specific height you have to be... it all depends on how comfortable you are on that bike. I ride a RM 125 and i can hardly touch the ground, yet i race it. I would suggest starting out with as big of a bike as you can get. -woody.eldridge@yahoo.com
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.
big wheel 85's are around 89cm
3ft and a half
you can ride a kx 85 any age there is no lmit :D
85 inches IS the height.
you have to weigh at least 85 lbs. to ride in the passenger seat
the length of drop on Jurassic Park-The Ride
Get a 125cc. If you already know how to ride then you will get bored with an 85 real quick.
125cm
It is 1 meter tall and 85 cm extra. :-)