Write an article based on this "Think about what kind of Harley-Davidson you want purchase. Research different models that appeal to you. Learn about motorcycle specifications and features."

Article:
There are six model families in the Harley-Davidson lineup, and within those six families a huge proliferation of sub-models. Opting for one or another is partly a matter of budget, riding style, and aesthetic preferences.  Sportster: designed for speed and fun; the entry-level Harley, good for beginners. Dyna: a cruiser for longer rides; comfortably seats two; larger engine than Sportster; combines traditional and custom appearance; prices can vary, but lower-end Dynas are an affordable way to get a . Touring: smooth riding for long distances or day trips; powerful engine; can seat two comfortably; features may include stereo, windshield, etc. V-Rod: Using an innovative dual over head cam liquid-cooled, 123 hp Harley V-Twin engine designed in cooperation with Porsche, this power cruiser with a unique, hydro-formed frame is now out of production, 2017 being the last production year. Although, even with its 9K rev limit engine which could be driven at a low RPM, rumbling along as a traditional HD Big Twin or as a high finesse crotch rocket, this bike was not excepted by the greater Harley Davidson community. In spite of its innovations, sales were low.  Softail: the hidden rear suspension harkens back to the traditional "choppers" of the 1960s; powerful Big Twin engine.  The Street: introduced in 2014 in India; lightweight model is geared towards riders looking for a powerful yet affordable bike. Model specifications can change from year to year. The more knowledge you have about what you are looking for, the better the chances that you'll be happy with what you purchase. There is a wealth of information on Harleys, both in print and online.  Read about Harleys online. Read up on the history of Harleys, plus industry reviews, user reviews, forums, and more. Browse books and magazines on Harley-Davidsons. There is plenty of print material on Harleys, including books and periodicals that specifically deal with the buying process. Check out your library, local bookstore, or online booksellers. While the list of all specifications and features is extensive, learning the most important can help you narrow down which model is right for you. It can also help you better navigate the buying process.  Motor/engine size: expressed in cubic inches (ci) or cubic centimeters (cc): this measures the cylinder displacement as pistons move from highest to lowest point. Big Twin engine: a Harley term for non-unit engines; that is, they do not share casing with the gearbox components; more powerful. Twin Cam engine (also known as Fathead): Harley engine that has more than one camshaft in the engine for increased performance.  Fuel mileage: how much fuel the bike uses per mile. Saddlebags: bags towards the rear of the bike; helpful if you need to carry things on your bike. Anti-lock brakes (ABS): important safety feature that is not yet standard on all bikes; helps tires maintain contact with the road during breaking and prevents uncontrolled skidding. Windscreen or fairing: helps protect rider from the wind and rain; can make long rides more comfortable. Crash bars: hoop-shaped bars that help keep the bike off the rider in the event of a crash.