My 2014 was long overdue for a Coolant Change...............So I did it today.
It still looked Blue and Clean however.
I spilled a little while draining the old fluid.
I removed the overflow reservoir, and scrubbed it out with a wheel-spoke brush.
Getting it out wasn't too bad. Putting it back in was slightly trickier.
There are two 10mm (head) bolts that hold it in place.
Long extension with a universal-joint helps out here.
And a clip attached to the right side that holds the overflow hose and the wire for a Sensor mounted to the back of the Engine/Transmission Case.
And yes, the overflow Reservoir comes out through this opening.
After filling the cooling system with distilled water, I closed it up and ran the engine for a few minutes until it started to get warm.
Then I drained it again.
I replaced the drain plug. (I did not use a new copper washer)
And filled the cooling system with "Yamacool".
Topped up the Radiator.
Then I put the rest in the overflow reservoir.
(2) Quarts is exactly enough to fill the Cooling System and the overflow Reservoir to the "Full" mark.
Then I started the bike and let it run until the Radiator Fan came on, then shut it off to cool.