Well, the gas tank looks like it could have been from a police version, but the rest of the bike looks like a regular K75RT.
Most of the pics of police bikes I have seen have had a solo seat with a radio box where the back seat is, and wider engine guard bars for mounting of lights/siren, etc.....(I've included a couple for reference)
NOT saying yours wasn't intended to be one, only your vin can identify that, but it doesn't look like it from your pics.


As Johnny will come along and say...... Ride it.
Sounds like you are on the right track to get all the fluids flushed out. 2yrs isn't all that bad