i weight about 135 and im 5'7 what would be a good bike... perferably from yamaha

Honda
80
thats what i have
would probably be good

a 50
if you have no experience what so ever


and no i am not a guy
justa random 13 yr old girl
who happens to ride
weird i know

i'm as tall as you and way about 15lbs less and i started out on a CRF150F. it was easy to ride, easy to learn on, and it wasn't to heavy. i also wouldn't recomend starting with a new bike because being a beginner you tend to crash and fall.
i hope this helps

I really would advise against a 2 stroke motocross bike as your first. Not because of power, but because a 2 stroke 125 has to be run very hard (at high RPM's) to avoid fouling spark plugs and to get any real power out of it. They absolutely suck as trail bikes so they are very limited in what you can do on one. I would recommend the TT-R230 for starters unless you will be riding motocross. The TT-R isn't really made for taking big jumps but is a great trail bike. If you do plan to ride MX then go for the YZ250F instead of the YZ125. The 4 stroke has much easier to handle power and works as good in the woods as it does on the track. You are to big for an 85.