well after about 5 or 6 hours of use on my new 2005 yz250f i decided to take out the airfilter and inspect. i was almost completly dry and the filter had almost no oil in it. i was noticing particles inside the filter as well as small blades of grass. im sure my bike injested some. would small particles of grass and stuff hurt the engine or cause defects or would the small grass particles blow right through and out the exhaust?
