Wider tires -
https://faq.ninja250.org/wiki/About_wider_tires
This may answer some questions -
https://faq.ninja250.org/wiki/Tires
More info you may find useful -
https://faq.ninja250.org/wiki/Ninja250_Howto
Generally, larger tires adversely affect handling and should be avoided.
You have 16" wheels, which are not very common at this point, so you don't have all the options that the newer 250 has with 17" wheels.
We had Pirelli Diablo Scooter tires on one of our Ninjas and Pirelli MT75s on another, and my son liked the less expensive Scooters better. I have found that Pirelli tires (even their car tires) dry out and crack long before they should, so I no longer will buy them.