Im 19 and i just got back from boot camp and tech training for the Air Force so a i have some loot in my pocket. I wanna start riding quads for a hobby. What kind of quad do u suggest i get for a starter. I know i want a  sport one.  

if you want to buy new the yamaha yfz450 will stand you on your head!

if you are going used buy you a yamaha blaster or a yamaha banshee.

both of those will do you well.  

oh and thank you for service to our country!!!