For some reason this problem has me stumped! my brain's just like "yeah yeah yeah, wait. no. or. yeaaaaaaaaaaaahhh. no? wait? wat?"
basically a beach ball is thrown straight up in the air and then falls back down. is the magnitude of the net force on the ball greater when going up, coming...
I used to be the GM of a dealership.
Buy a EX250, Buell blast (500cc) or
(slightly taller but you wont grow out of them)
Ninja 650 (depending on your stature),
SV650, EX500
For the gear, any big name brand with armor is best. Try it on before you buy. It should fit snug (not tight, not loose).