sitting 4-5yrs

Yeah, change all fluids. Don't forget brakes and blinker fluid.

Also dump out tank and put in fresh petrol with some PEA-based fuel-system cleaner. EFI systems have sealed tanks, so it doesn't degrade as quickly as carby bikes with vented tanks.

Measure battery, if it drops below 11v when cranking, you'll need new one.

Carefully inspect tires and should replace if more than 2-3 years old.

I would personally disassemble and flush out all the fuel lines, clean the injectors, and run the fuel pump with some fresh gas in the tank and discard a cup of fuel that comes out.

Inspect fork seals for oil leak as that tends to creep up on people after long storage times and ruins the brakes when you ride it.

I concur. Drain, bleed, flush anything with liquids. If the tires need it and if you have rubber valve stems then replace them with the 90 degree aluminum ones. Had old stems crack and leak so cheap insurance to replace.