Was racing my '06 this weekend in an area that became extremely silty as the race went on...much of it being ash from the eruption of Mt. St. Helens in 1980...and it mostly WFO running. About 2 hours into it my bike began running poorly as the air filter was getting packed up but I did not want to pit to change it out as the race was almost over and I was leading my class. It was a bad decision and ultimately the filter became so packed up with silt that it just started sucking through into the carb. The bike started blowing some smoke and I began to hear a "not good" sound in the valve cover so I shut it down and took a DNF on the last lap. Airboot was coated with silt, carb throat and slide were completely coated with silt...just getting ready to tear into the top end and assess the damage...what am I most likely to find? What should I be primarily looking for?