It depends on the conditions on which you drive.
Agar bike ko annay waa speed dene k aadi ho to you will hardly get 30km/liter out of it. But agar banday k puttron ki tarha chala saktay ho To you will easily get nearly 40km/liter.
On STOCK SETTINGS you will hardly get 30-35km/liter from your bike. And the factory/stock settings should NOT be changed before atleast 7000 km ... Why? Well ask a mechanic.
After 6000 or 7000 kilometers, you can readjust your Mixture Settings with your Tappets, and you will easily get 40-45km/liter.
Also do note that Too Much reduction in fuel will result in more heat of engine, so keep the settings only a bit off than stock settings.