As I was reading down I was about to mention the water trick but I see Mechano beat me to it. Be very sparing in the amount though remember cold on hot = bad. This is not just a Harley trick I have been doing that on small block Chevys for as long as I can remember to clean em up before checking valve clearances. Naturally clean em today adjust em tomorrow.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!