If the oil change has been longer than 8 months, change it again. Oil like gas breaks down. You should change it at the end of the season every year. Ski's are hard on oil.
I'm actually jealous. I love that color scheme. I prefer Kawi's over anything.
A good wax like mothers is recommended and protects it from the elements. I've heard some say that wax causes friction on the bottom, but I disagree, but at the least, keep the bottom good and clean.
Did the ski come from the east coast ? I would look around for any salt water corrosion and rust. I mean everywhere. Look at the jet pump from both ends for any impeller or pump damage, and expect to put ne bearings and seals in the pump every 2 years as a safety precaution (depending on the amount of use of course). That's my suggestion with every modern ski. If the bearing fail, it puts pressure on the thrust bearings and surfaces of the crank, and can wipe them out pretty quick.
I use a trigger spray leather conditioner on seats and any other vinyl on my ski's after use. Spay it heavy wipe around with a paper towel, and let it soak in and dry. Wipe off excess after a couple of hours.
I also highly suggest you watch videos about using pwc's, and go talk to your local Kawi dealer to get familiar with the controls. Remember, when you start it, it moves. There is no neutral, well there is kind of if you put it in reverse halfway. That's all neutral is on ANY pwc. The jet pump is going as soon as you start it for cooling purposes, so be pointed in the direction you want to go, take it easy for a few min, and shut it off early enough to just coast into where ever when your done.
Also set yourself up with a mooring setup. I use a 15lb anchor, bow line, large boat bumper, and a good carabiner to hook on to the bow loop. I highly discourage beaching. Beaching scratches and gouges the hull, and can get sand and rocks in the jet pump and cooling system. Be in no less that 18" of water before starting.
Remember, when you shut the engine off, there is no steering, and minimal steering at idle.
Take your time and get used to it.
Your really going to like that ski !!!!!
We want to see pictures when you get it !!!