I have a 08 F1000, it was running hot the past 2 rides, today I could smell coolant. I took the top off ( poor cat deisgn ) anyway, I took it off to check the coolant level, it looks low, however there isnt a full level mark. I dont see any leaks, I am thinking that it may have gotten hot and came out the overflow tube.unless I am not looking in the right place. How full should the coolant tank be?