WOODSTOCK — When scores of motorcyclists depart the Capt. James A. Lovell Federal Health Care Center in North Chicago about 11 a.m. Sept. 16, they hope to raise more than a few bucks for a good cause. They hope to raise the consciences of everyone they pass — 3-by-5-foot POW/MIA flags fluttering — along their 1.5-hour, 42-mile ride from North Chicago to the Woodstock Harley-Davidson dealership.