The Buell 1125R.Continuing hard times at Harley-Davidson came to something of a head Thursday with the announcement that the company was killing its Buell line of sport bikes almost immediately and actively looking for a buyer for its MV Agusta and Cagiva machines.Harley, which is based in Milwaukee, also disclosed continuing losses at its finance unit and a decline in sales of its heavyweight Harley-Davidson motorcycles. Overall, Harley’s net income for the third quarter plunged by 84 percent f