The Mild Ones
Both motors pay excellent homage to the original versions. To tame vibrations in the pumped-up Sportster, Harley-Davidson introduced rubber engine mounts for '04. Generally, they work well at reducing the V-twin's most objectionable vibrations. The Triumph's engine is a more contemporary design, with dual overhead cams and twin balance shafts. It's much smoother than any vintage Bonnie.
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