I brought a 125cc self start Bajaj Discover Dtsi last year november. Pick-up, comfort, style everthings ok but it gives just 40 kmpl in city, Gear Box lacks quality, no disc brakes, But the bike surely will give you a thrilling experience. My friends who owns it also have similar experience. frankly 125cc will not give you 65 kmpl, may be you can try 112cc (without electric start), if u are looking for mileage.
I have clocked 1000 kms already and done two services. Also, at higher speeds (60kmph +) engine makes sound as if you are on a lower gear. I am not a critic, but these are my true experiences. The bike is really powerful in its class compared to any other bikes.Means you can make your fellow riders see your tail, when on road. I went little off-road with a heavy pillion rider, most times I could hear bottom hitting something below