The Forum has had much discussion on which air filter is best and I wish there was someone who would make an objective test so we would actually know but there is no Consumer Reports for ATV's. Has anyone had any bad experience with the stock Honda air filters? I have always alternated use between the stock filter & UNI filter so there is always a fresh one ready to go and have never found any trace of grit in the intake tube with either one. Although I am a farmer and work in the dirt, I am sure some readers have experiences in the sand dunes that would really be the test of an air filter.