I was riding today and I noticed that I had some coolant, I use engine ice, leaking from the little hole near the coolant drain bolt, to the right. The hole Im talking about is near the bottom of the pump(I think), the part that goes into the engine. I had a new exhaust today and it seem kinda lean with backing and popping on deaccel. I checked my coolant when the bike cooled down and I have lost quite a bit, I cant see it even when I rock the bike side to side. Did I boil out coolant from being too lean or is this something else? The other thing is when I had my previous exhaust the same thing was happening for 1 ride and then it stopped the next so I figured I just put too much coolant in.