June 7th
Mark Gruber wins the inaugral Dairyland Classic at the Sheboygan County Fairgrounds oval on a Rotax 500cc.
Between 1985 and 2012 Rotax-powered machines won 16 of the Dairyland Classics. In 2008, Rotax began manufacturing the 1,125cc Helicon liquid-cooled, four-stroke, fuel-injected 72° V-twin for Buell.