Hi Talha,
I'm not sure this repair forum is going to be the best place to find information on performance improvements for a motorcycle. I'd suggest you look for Suzuki GR 150 forums where you will find like-minded enthusiasts who can undoubtedly give you better advice than the general information you're likely to get here.
For example, you could check out this GR 150 forum; start there then look for more.
[link|https://www.pakwheels.com/forums/t/suzuki-gr150-2019/1204165|Suzuki GR150 2019 - Bike Forums / Suzuki Bikes - PakWheels Forums|new_window=true]