LIMA — The Allen County Fairgrounds is no stranger to the throaty roar of motorcycle pipes. But next year, a different kind of bike will be rolling in, something far quieter but with every bit as much muscle. In July, the BMW Motorcycle Owners of America will hold its annual rally in Lima, bringing around 7,000 people and 4,000 motorcycles to town. Despite the name, the group is an interna-tional organization with members in 40 countries, many of which send at least a few to the rally, organizers said. “We’re going to transform the Allen County Fairgrounds to Beamerville, USA,”...