The 250 has a 5 speed, and I think your 300 has a 6 speed doesn't it?
My stock 250 runs 75 mph or 120kph pretty easily, and will break 80 mph or 130 kph with a long enough straight.
Yours is a single vs my twin, but still is supposed to have a little more torque and power. It should have a completely different feel and lower rpm power band and redline but with the 6 speed it should do a little better than that unless it is geared too low. 110 kph is only 68 mph so it should have a lot left in reserve. No need to change sprockets that I see. Have you gotten a good feel for top speed yet, or are you still breaking it in.
I know there is only one way in and one way out of Ft Mac, but those are pretty wide open 4 lanes until you get up to where the gravel begins, or you cross the bridge to nowhere. Im not sure about the speed limits, but I don't remember them being very high. I don't think they are like our Interstates where it is listed 70 mph, but everyone is going at least 80 mph or 130 kph and the 250 has to run WOT just to barely keep up. You should have no problem going fast enough to get plenty of tickets, and get in plenty of trouble with the stock setup.