BUCHANAN, Mich. – The penultimate round of the Mtn. Dew ATV Motocross National Championship, sanctioned by AMA (ATVMX), ultimately resulted in the crowning of an AMA Pro ATV Champion on Saturday as defending two-time titleholder Chad Wienen cemented his status as one of the all-time greats by securing his third straight championship with one round remaining. Wienen …read more.