i wouldnt recommend the yamahas... their clutch is what was known as "clutch hidup" back in the day.... meaning u can actually use the bike without the clutch like stopping at red light in first gear n no need hold clutch.

suzuki RG Sports had "clutch mati" so its a full on proper clutch which will kill the bike if its in gear at a stop.

i think an FZ150 can get cheap now. so perhaps look in to that.

Good if you wanna ride on dirt road.
Not good if you wanna spend lots of time on the tarmac.

Them dirt bikes in their 21"/18" not nice on tarmac.