6. Triple

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Could be their compact size, the odd number of cylinders, the combination of four-cylinder revviness and Twin-like torque, the wailing drone they make when on song, or all of the above that endears inline-Triples to many motorcyclists. We were happy to see a resurgence of Triple-powered motorcycles beginning with Triumph in the 1990s, then MV Agusta and now Yamaha. Most who have owned a three-cylinder forever have a soft spot for the engine configuration.