I rode one of those for 16 years.
I bought it with 42k on it, ran it to 168k & sold it for $50 more than I paid for it.
Easily one of the most comfortable bikes you'll ever ride, I rode mine between LA & SF via the PCH more than once.
Kawasaki did a great job designing that bike for a 220 pound rider to be saddled for 8 hours at a crack.
That's a good thing because there are zero options
for other seats unless you get out your grinder & welder.
GOBS of power once wound up to about 5000 rpm
, that's when the dragons really come out.
Best commuter bike ever too - NOBODY does stupid stuff or crowds you, especially if you wear a 2-tone helmet & gray jacket.
Fairing is fixed & extremely stable, also has 2 storage compartments in it.
You can rig it for a passenger, but the chassis is so short your rider will be RIGHT against your back & these don't have anywhere to mount passenger pegs.
I got a pair of back pegs cobbled onto mine but clearance was terrible & resulted in more than one pair of melted boots.
The plastic fenders are designed to support a radio box or trunk with a radio in it.
The only safe way to carry one is to fabricate new mounts for an older style bench seat that bridges the radio carrier frame in back up to the front seat mounts.
Eve then it's kinda iffy but if you're comfortable doing it, go for it.