I am 5' 8" and 150 lbs. I want to get a trail bike to occasionally ride along with my son. (he has a PW-50) I would also like the bike not to be too big since I would like his sister to ride it when she comes and visits. She is 5' 3", 130 lbs. Should I get a Yamaha YZ85, TTR-125, or a TTR-125L? (My son wants me to get a Yamaha to match his bike.)