You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did harley come out with the 103?" whose answer is 2010.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Harley Davidson 103 engine release date
Useful Output:

Doc 1: These simple yet powerful engines were available in 61 cubic inch and 74 cubic inch sizes, and were produced from 1914 through 1929.
Doc 2: The next year, in 2010, some of the touring bikes got upgraded to a 103 cubic inch Twin Cam motor, which trickled down to some of the other
Doc 3: The 2016 MY Harley Davidson Softail Slim sports an air-cooled, four-stroke, 1690cc, High Output Twin Cam 103B powerhouse paired to a six-speed manual
Doc 4: Milwaukee-Eight (2016-present)  In the summer of 2016 Harley-Davidson launched the ninth engine in the line of Big Twin hardware. It's a
Doc 5: Twin Cam 96 and 103 Models (2007-2016). Many Harleys from 2007-2012 were manufactured with the Twin Cam 96, which was a decent improvement over