Hi, Bunker Buster.
The Yager's a great little bike, if it's well maintained. Mine will do 77 MPH (it'll hit 79 if the air temperature and humidity is just right), but that's over redline, and is most likely because I did a hard break-in of the engine to properly seat the rings, and because I'm running Dr. Pulley sliders, which gives a bit more range on the CVT. Most bikes will hit 72 MPH or so.
I'm getting about 65 MPG, but others are doing better... might be because I use mine on the freeway at 70 to 75 MPH for about half my riding.
You might want to ask if there's been any modifications, problems, etc., and if the previous owner has a record of the maintenance done on the bike.