Q. I had my first service done on first week of April 2021, but i get an avg of 25kmpl. I always go for premium petrol, i get a better average of 30 kmpl when i go on a ride trip. So will i get an avg of 35 kmpl after my 2nd service?

It'll definitely get better from 25 to nearly 30 kmpl. But getting more miles, depends on how you ride your bike, where you ride it, in which traffic conditions etc. Honestly, in cities like delhi or Mumbai or Bangalore etc with heavy traffic on and off. You'll only get 31 kmpl max if you're soft on the throttle and a good rider. And yes you can get a 32 to 35 kmpl but only on highways with some riding terms and conditions. But Getting 35 kmpl in cities, next to impossible. Try to maintain your bike's health. It'll be good for the long run.

Yes you will get the good mileage and speed.