1.Check tyre pressure and fill it according to the recommended air pressure in bike's manual..
2.Take your bike to any "rim through wala" and get your front rim checked..
3.Get your tyre checked from a tyre shop not a petrol pump puncture shop..
4.Get your handle Checked..
5.Check the issue 3,4 times on different roads..
I've experienced this for a long time on my suzuki gs 150.. after 2 years, came to know that the front tyre was out (misaligned) :D.. changed it and the issue was solved after that..
If it doesn't get solved after all this, then Find a CG rider and give him your bike to test it out.. if he says its fine then probably it's only in your mind..