So i was taking apart the carb on my 09 to make some jetting changes and noticed this dirt underneath the top of the carb. Is it possible this did damage to the valves and/or cylinder. Should i be worried about it. I change/clean the airfilter before every ride.I switch out between a twin airfilter and the stock filter and use pj1 filter oil (since switched to no-toil). I know some dirt will get through but that seems like a lot to me. On one previous ride the airfilter did get very dirty after two hours of riding a dusty track. The dirt i found looks rather similar to the dirt of that track so i am hoping it was a one time thing where that much dirt got into the carb.