well since no one will answer this on the 450r forum. last time i rode my 450r, was about 1 or 2 months ago, my air filter fell off! i guess it had been off that whole day because i could here it suck in air but i didnt think anything about it. well my airbox was really dirty, when we put it back on there was a bunch of dirt around the ring that the filter goes into. My 450r started for like 10 seconds after that and we found that my engine to carb boot was busted. so my friend got to be a tow truck and pull me home. when i got to the down hill place right before my house i got it started and it ran enough to get me home which is like 1/4 of a mile. It was bogging and back fireing, and as soon as i pulled in it shut off. Im afraid that it may have got a bunch of dirt in the carb and the motor. Should i be concerned just about the carb or the motor as well? please help. also the reason i havent rode it in a long time is because were doing a winter xc build!!!