so i was at the track today thinkin of riding or not considering it was 43 degrees and windy. but anyway, there was a younger kid who is supposedly is sponsered and was doin decently well. a bunch of us were watching him and saw him whip it over a jump that goes down past where no one can see into hte lower section of the track. we heard the biek go over and as we were waitin for the sound of the motor to rev up and haul butt...we heard nothing. so we all ran down to him and he was fun...didnt see any signs of a wreck and asked what happend as his mechanic was loookin at the bike. found out hte motor blew...at first i was like hes probably a honda since i couldnt see that well and as i came down to help push it up the hill i noticed it was a yammie. i was like no way this cant be. a few of us started askin the simple things like what year blah blah blah...found out it was an 08 they had recently purchased and had less then 30 hours on it. then we were all def like ***? the mech takes off the seat cover and the rest of us looked and sw the filter and was like holy bleep blep bleeepe!!!! the filter was soooo nasty it literally doesnt look like its been cleaned in its entire 30 hours of life. u could scrap it with ur finger and there was still massive amounts of dirt on it. the mechanic tried sayin that it was from the track and his rider is justhard on his bikes and really hard on his filter..but i kow hes full of it as ive been ridin the track for a lil over 6 months now and never ever gotten to lookin like that... the mechanic came to say at least 1 possbily 2 valves look like they dropped. i believe hte motor is actually not gona be that bad but the top end is gona need rebuilt. luckily the motor still could spin smoothly when movin the kick starter but def a large notice loss of compression... so the lesson here learned is...clan yo damned air filter, cause ouch, it could be a hurtfl expensive one!