I've dropped and raised N250 forks an 1"-1.5" over the years and don't notice any real crazy changes... not with stock forks, springs, and oil levels. They always feel pretty neutral overall to me. On heavier bikes I've had more issues. I pulled these up about 3/4" so top of fork tube is level with clip-on.
Right now I'm trying work with clip-on positioning...so the starter/horn buttons don't hit tank bulge and get broken. And I did not try the clip-ons below the triple-tree top clamp yet... just seems a bit way-too-low for my 6'2" frame. but easy enough to try soon and see.
Prob go with bar end mirrors too.
In the process of moving so I'm on a little hold for project for a few weeks. Did not realize how much Ninja 250 stuff I'd collected over the past 15 years-- til I got ready to move it all
!!!