The 2004 Yamaha V Star 1100 recommends premium gasoline primarily due to its engine design, which may include higher compression ratiOS that can lead to knocking or pinging when using lower-octane fuels. Premium gas has a higher octane rating, which helps prevent engine knock, ensuring smoother performance and optimal power output. Additionally, using premium fuel can enhance engine longevity and efficiency, aligning with the manufacturer's specifications for the best riding experience.
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