Mate I use distilled water and drain after each ride, the coolants react between the magnesium, alloy & steel making a battery = electrolysis.
Distilled water has no particles well impurities and should be PH neutral. To drain means not to allow the water/coolant to become acidic. I also drop off the water pump cover if parking the bike for a while, oil the gaskets so they remove easily & don’t forget the barrel bung drain.
