I have a VRSCA and am doing a water pump and thermostat replacement. Found out I had to purchase thermostat housing to even get the thermostat. I am wondering if the coolant HD sells is the best purchase for this bike, kind of expensive, but I don't want to put something in that the motor won't like. Also is sealant to be applied on the thermostat housing gasket? Any comments on what type of coolant would be appreciated.