Harley-Davidson Road King Custom [2004-2007]: A Timeless Cruiser for the Open Road

Introduction

The Harley-Davidson Road King Custom (FLHRS/FLHRSI) from 2004 to 2007 remains a standout in the touring-cruiser segment, blending classic Harley styling with the raw charisma of a modern-era V-twin. Designed for riders who crave both highway comfort and urban swagger, this generation of Road King Custom carved its niche with a low-slung profile, chrome accents, and the iconic "beach bar" handlebars. But how does it hold up today? Let’s saddle up and explore what makes this machine a legend.

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Design & Aesthetics

The Road King Custom’s design is a masterclass in balancing nostalgia with practicality. The streamlined front fender, hidden saddlebag supports, and chrome wind-swept visor give it a clean, uncluttered look. Unlike its bulkier touring siblings, the Custom variant opts for a minimalist approach with cast slotted alloy wheels and sleek footboards that scream confidence.

Color options ranged from understated Vivid Black to eye-catching Rich Sunglo Blue and Yellow Pearl, ensuring riders could pick a personality that matched their own. The leather saddlebags (standard on all models) are both functional and stylish, though purists might argue they’re almost too pristine for a bike meant to eat miles.

The 26.1-inch (663 mm) seat height makes it accessible for shorter riders, while the pullback handlebars encourage a relaxed, arms-forward posture. Harley nailed the "custom" brief here—this bike looks like it rolled straight out of a garage build, not a factory floor.

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Engine & Performance

Under the tank lies the heart of the beast: Harley’s Twin Cam engine. The 2004–2006 models packed a 1449cc (88 cubic-inch) air-cooled V-twin, while 2007 saw an upgrade to the 1584cc (96 cubic-inch) Twin Cam 96. Both engines deliver that signature Harley rumble, but the larger mill’s 125.6 Nm (92.6 lb-ft) of torque at 3500 RPM transforms the riding experience.

Throttle response varies between years. Early models with carburetors (like the 2004) feel slightly more analog, while fuel-injected versions (2005 onward) offer smoother power delivery. The 5-speed gearbox (6-speed in 2007) is clunky by modern standards, but shifting becomes second nature once you learn to embrace the mechanical "clack."

On the highway, the Road King Custom is happiest between 60–75 mph (96–120 km/h). The engine doesn’t scream for mercy at higher speeds, but vibrations through the pegs and bars remind you this isn’t a sport-tourer. Fuel economy hovers around 43–45 MPG (5.2–5.5 L/100 km), which is respectable for a 750-pound (340 kg) cruiser.

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Riding Experience

Fire up the Twin Cam, and the exhaust note alone is worth the price of admission. The crossover dual pipes produce a deep, resonant growl that turns heads without deafening pedestrians.

The riding position is pure cruiser: feet forward, hands at chest level, and a seat that’s more couch than saddle. At low speeds, the 63.5-inch (1613 mm) wheelbase and 345 kg (761 lbs) wet weight demand respect—this isn’t a bike for darting through traffic. But once you’re rolling, it stabilizes beautifully. The air-adjustable rear suspension soaks up bumps, though rough roads can still jolt your spine if you’re riding solo.

Cornering is… deliberate. With a 26-degree rake and 6.2-inch (157 mm) trail, the Road King Custom leans into curves with the grace of a freight train. It’s stable mid-corner, but don’t expect knee-down heroics. The MT90-B16 front tire and MU85-B16 rear provide ample grip, though the floorboards will scrape long before the tires protest.

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Comfort & Ergonomics

Harley’s focus on comfort shines here. The broad, foam-filled seat is a throne for all-day rides, and the wind-swept visor does a surprising job deflecting wind at highway speeds. Passenger accommodations are generous, with ergo-friendly footboards and a separate seat height of 27.1 inches (688 mm).

Storage is a mixed bag. The leather saddlebags look fantastic but offer just 1.4 cubic feet of space—enough for a weekend trip if you pack light. Aftermarket luggage racks or a sissy bar bag are wise investments for touring.

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Competition

The Road King Custom faced stiff competition in the mid-2000s cruiser market:

1. Honda Gold Wing (1800cc): A tech-heavy touring behemoth with superior comfort and a silky-smooth flat-six engine. But it lacks the Harley’s curb appeal and customization potential.
2. Indian Chief Classic: A retro rival with comparable torque and heritage. The Chief feels more niche, though, with fewer aftermarket parts available.
3. Yamaha Royal Star Venture: Yamaha’s answer to luxury touring, featuring a V4 engine and plush seating. It’s smoother but lacks the Road King’s raw character.

Where the Harley wins is in its aftermarket ecosystem. Swapping exhausts, seats, or handlebars is trivial, and the belt drive requires far less maintenance than chain-driven competitors. For riders who value personality over pampering, the Road King Custom still reigns.

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Maintenance

Owning a Road King Custom isn’t just a lifestyle—it’s a commitment. Here’s what to watch:

• Oil Changes: The Twin Cam thrives on SAE 20W-50 oil (3.8 liters with filter). Stick to Harley-specific formulations or high-quality alternatives.
• Belt Drive: The Zahnriemen (toothed belt) is durable but inspect it every 5,000 miles (8,000 km) for cracks. Replacement belts are widely available at MOTOPARTS.store.
• Valve Adjustments: Hydraulic lifters (HYDROSTÖSSEL) eliminate manual valve adjustments—a blessing for DIYers.
• Brakes: The dual front discs offer decent stopping power, but swap to sintered pads for heavier loads. DOT 4 fluid should be flushed every two years.
• Tires: The 16-inch wheels limit modern tire options. Consider upgrading to radial tires for better grip and longevity.

Common wear items include ignition coils (use NGK DCPR7E plugs) and fork seals. Keep the air filter clean, especially on carbureted models.

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Final Thoughts

The 2004–2007 Road King Custom isn’t perfect. It’s heavy, thirstier than modern cruisers, and its suspension feels dated. But perfection isn’t the point. This bike is about the experience—the way it rumbles at stoplights, the way strangers ask about it at gas stations, the way it transforms a mundane commute into an event.

For riders who value tradition but refuse to compromise on presence, the Road King Custom remains a compelling choice. And when it’s time to make it yours—whether with new pipes, a custom seat, or upgraded shocks—MOTOPARTS.store has the parts to keep this legend rolling.

Ride safe, ride loud.

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Specifications sheet

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