Backfiring "takh" "takh" "takh" was my real problem plus the loose throttle.
Let me tell you something, every normal throttle takes approximately 1 inch of distance from standstill to the maximum push, and the 1 inch push is constant in its hardness.
My throttle was soft the first 0.2 inch and the rest of 0.8 inch would be normally hard.
The moment i push 0.2 inch of the throttle the engine would rev to its maximum and then backfire "takh"
So maybe it was my carb/carbs.
As said earlier, the problem got rectified within 20 minutes of driving.
Now, things are fine, i have ridden it like for 3 hours and no problem.
I really want to know what happened that day.