i grew up with dirtbikes and am looking to get another used one. i've been away from the scene for about 25 years now. i used to own a dr 80, yz80, and a 1984 kx 125. i stopped riding at 14, i'm 38 now. i pretty much stopped riding in 1985, but am now looking to get back into it. i've been away so long that i don't know what's good anymore. do i go 2 or 4 stroke? i'm not going to race, but just do some trail riding and possibly hit a mx track every once in a while. i'd also like to get it to ride with my nephew who's 9 years old. who makes a good used bike nowadays that i'm not going to break the bank on. $1500 is my price range. any advice appreciated.