Did you actually see coolant dripping from the leak or notice the level in the overflow tank was going down? I’ve noticed the smell of coolant a couple of times on my ‘16 and am planning to have a look this winter.
Mine was a slow leak but I noticed a few drops of coolant on the garage floor. At first, I attributed it to the cracked coolant overflow reservoir which I replaced. After that was dealt with, I was still getting some drips. I initially thought leaky hose connection (a common source of drips), but upon close inspection, I could see a damp spot and evidence of crusted salts on the radiator so I had a two-fold leak. I could smell hot coolant with the bike fully warmed up but it wasn't strong. Mine wasn't bad enough to seriously deplete volume or cause engine overheat. I guess I caught it early.
Anyway, look for drips and sniff for smells.
Monitor overflow tank levels, but this varies a lot depending upon how warm the engine is as well as ambient temperature.
Check overflow tank for cracks or drips. Mine was cracked, brittle and hard. Make sure that the rubber siphon hose goes to the bottom of the reservoir and that it isn't kinked (or leaking).
Check radiator cap for leaks.
Check all hoses! To and from radiator, water pump, around radiator cap and thermostat. Often a half-turn of a hose clamp is all that is needed to stop a small leak. I have never had to replace a hose due to crack or split.
Make sure water pump itself isn't leaking.
Also the coolant pipe on top of the engine - the o-rings can fail and the wells will fill up with leaking coolant. Make sure you use new o-rings if you remove the coolant pipe and check that it is leak-free (with hot running engine) before you replace the heat shield, t-bar and tank after valve check etc.
Check radiator carefully. If you are lucky, the leak will be in a place where you can see it. You may see liquid coolant or crusted salts on a radiator from an older leak.
Note: Removing and replacing radiator isn't a lot of fun!!!
Good luck!