I'd probably suggest test riding a Honda CG 125 and the Yamaha YBR 125:
http://www.motorcyclenews.com/MCN/bikere...5-current/
or http://www.motorcyclenews.com/MCN/bikere...-current4/
http://www.motorcyclenews.com/MCN/bikere...--current/
Although to a large extent it'll depend on his height and weight and what he'll fit on.
But those would be a good place to start looking and should both be safe bets.
You could spend a lot more on something more flash, but realistically it'll likely be a stepping stone to something else.
As Nick says, don't be temped by Chinese clones of the above.
Andy
http://www.motorcyclenews.com/MCN/bikere...5-current/
or http://www.motorcyclenews.com/MCN/bikere...-current4/
http://www.motorcyclenews.com/MCN/bikere...--current/
Although to a large extent it'll depend on his height and weight and what he'll fit on.
But those would be a good place to start looking and should both be safe bets.
You could spend a lot more on something more flash, but realistically it'll likely be a stepping stone to something else.
As Nick says, don't be temped by Chinese clones of the above.
Andy