Do you have to adjust the suspension on a 250cc Honda Nighthawk to ride with a passenger?

Do you have to adjust the suspension on a 250cc Honda Nighthawk to ride with a passenger? - 1

Yes.

Yes

Yes, adjust the pre-load and put extra 3 to 4 pounds in your rear tyre.
Refer to handbook for the exact figure.

I know little girls who don't. They just giggle and ride 250cc.