Check the drain from the coolant pump. If the water side seal is leaking it may be why you are topping up the coolant.I love mine too!
I don't have any complaints about the OEM Pirelli tires or the QuickShifter after 3,700 miles.
I am having to top off the coolant reservoir with about 6-8 oz. of coolant about every 350-400 miles, but I'm not seeing any leaks or anything coming from the overflow tube. Hopefully, it's nothing to be overly concerned about.