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The Z900RS wraps Kawasaki's 948cc inline-four in Z1-heritage retro styling — the same engine family as the Z900, giving it modern performance behind the classic aesthetic while keeping cornering ABS and TFT instrumentation on ABS-equipped models. Buyers choosing between it and the Triumph Bonneville T120 are trading the T120's parallel-twin character for a higher-revving four-cylinder with a more contemporary chassis; a 2024 front tire recall (24V270000) affects ABS variants — verify completion before purchase.

Kawasaki's Vulcan S uses the Ninja 650's 649cc parallel-twin in a cruiser chassis with the Ergo-Fit system that adjusts seat, footpegs, and handlebars to fit a wide range of rider sizes — the most physically adaptable beginner cruiser available. Used at $4,000–$6,500, it is the strongest value in the entry cruiser segment for buyers who don't need V-twin character.

Aggressive naked with a character-rich triple engine and sharp handling.