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Message: <blockquote data-quote="dj gamaya" data-source="post: 7794324" data-attributes="member: 61857">ENGINE In a sea of standard-issue Inline Four and V-Twin engine configurations, the RSV4 differentiates itself by using an ultra-compact 65-degree, liquid-cooled, 999cc V-Four. Double overhead camshafts drive each of the 8-valve cylinder heads and the 78.0 x 52.3mm bore/stroke measurements is the most oversquare among the four cylinder-powered motorcycles with exception of the BMW. Each piston squeezes fuel received from the dual-stage fuel injection system to a ratio of 13:1, which is identical to the S1000RR, signifying the potential for some serious engine performance on tap. From the moment you press the starter button the Aprilia delivers an exotic riding experience that the others simply can’t match. The howl that emits from the engine is absolutely intoxicating and it’s so thunderous that I’m amazed that it’s legal. The reason it can get away with this is due to the clever use of a flapper valve inside the trapezoid-shaped muffler. When the bike is in neutral the valve is closed keeping noise to a reasonable 88-decibel level. Drop the bike into gear and the valve instantly opens and belts out the V-Four’s fully unedited soundtrack to the tune of 93 decibels. It sounds even more awesome at speed with a measurement of 112 decibels at 6800 rpm (half of maximum engine speed), tying the Ducati for the award of the loudest motorcycles in the test. It’s amazing considering that the 1198S Corse we tested came with a set of aftermarket Termignoni mufflers.                            <img src="http://www.motorcycle-usa.com/PhotoGallerys/xlarge/2010-aprilia-rsv4r-smackdown-street.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

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