dont wast you money on a 125
i had the same bike -- great bike , but there a race bike a,d most are built for full throttle riding,and no bottem end
do you like to have power to climb hills, and play around right off the line
trhe reson i said this is im 6.1 and weigh a little more than you, and there just like a toy!!-- i think you would be so much happier on a 250
ride it and see i guess
i ride a 500 so even a 250 is like a toy
yea you can do motor work,and change sprockets. but what do you really want
and that will cost a lot
the pipe and silencer is like 250.oo modification
i still have a set of forks for it if you do buy it lol