Harley-Davidson Roars to Record Earnings  CHICAGO (Reuters) - Motorcycle maker Harley-Davidson Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=HDI.N target=/stocks/quickinfo/fullquote"&gt;HDI.N&lt;/A&gt; reported record quarterly earnings on Wednesday as more  efficient operations and the weak dollar boosted its margins.