Harley-Davidson Softail Slim (2021-2022): A Timeless Cruiser with Modern Muscle

Introduction

The Harley-Davidson Softail Slim has always been a love letter to motorcycle purists, blending old-school aesthetics with modern engineering. The 2021-2022 iteration of this iconic cruiser stays true to that ethos, offering a stripped-down, minimalist design paired with the thumping heart of the Milwaukee-Eight® 107 engine. As a rider who’s spent hours on this machine, I can confidently say it’s a bike that rewards those who crave authenticity without sacrificing comfort. Let’s dive into what makes this generation of the Softail Slim a standout in Harley’s legendary lineup.

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Design: Retro Cool Meets Modern Craftsmanship

Harley-Davidson nailed the "bobber" vibe with the Softail Slim. The 2021-2022 model features a low-slung profile, chopped fenders, and steel-laced wheels that scream vintage cool. The 2310 mm (90.9 in) overall length and 1630 mm (64.2 in) wheelbase give it a stretched, muscular stance, while the 648 mm (25.5 in) seat height ensures even shorter riders can plant their feet firmly.

Color options like Midnight Crimson Red/Stone Washed White Pearl and River Rock Grey Denim add a touch of sophistication, but the Vivid Black version is pure outlaw charm. The minimalist chrome accents and blacked-out engine components keep the design clean, though Harley fans will notice subtle upgrades like the modern LED lighting that’s integrated without breaking the classic look.

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Engine and Performance: The Milwaukee-Eight Roar

At the core of the Softail Slim is the 1746 cc (106.54 cu in) Milwaukee-Eight® 107 V-twin, air-cooled and tuned for torque. With 149.2 Nm (110 ft-lbs) of torque peaking at 3000 RPM, this engine pulls like a freight train from idle. The power delivery is smooth but authoritative—you feel every one of those 86 HP (64 kW) as you roll on the throttle.

The 6-speed transmission and belt final drive are seamless, eliminating the clunkiness older Harleys were known for. Cruising at 110 km/h (68 mph) in sixth gear, the engine settles into a relaxed 2500 RPM, making long rides surprisingly comfortable. Fuel economy sits at 5.0 L/100 km (47 mpg), which is respectable for a big cruiser, though the 18.9 L (4.99 gal) tank means you’ll still be stopping every 320 km (200 mi) or so.

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Handling and Comfort: A Study in Contradictions

Weighing in at 304 kg (671 lbs) wet, the Softail Slim isn’t a featherweight, but Harley’s chassis tuning makes it feel surprisingly nimble. The 30-degree rake and 147 mm (5.8 in) of trail give it stable straight-line manners, while the 49 mm telescopic fork and twin rear shocks handle bumps better than expected—though rough roads will still rattle your fillings.

Where this bike shines is in urban environments. The low seat and narrow handlebars make filtering through traffic a breeze, and the 130/90-B16 front and 150/80-B16 rear tires provide enough grip for confident cornering. Just don’t expect sportbike lean angles—the 120 mm (4.7 in) ground clearance reminds you this is a cruiser, not a canyon carver.

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Technology and Features: Just Enough to Stay Relevant

Harley kept tech simple here, and that’s a good thing. The 5-inch analog speedometer with embedded digital readouts (gear indicator, fuel range, clock) is intuitive and classy. Optional ABS on the 300 mm front brake disc (4-piston caliper) and 292 mm rear disc (2-piston) adds safety without cluttering the clean lines.

The Softail Slim skips modern distractions like touchscreens, but the Electronic Sequential Port Fuel Injection (ESPFI) ensures crisp throttle response in all conditions. I’d have loved cruise control for highway miles, but its absence keeps the bike true to its minimalist roots.

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Competition: How Does the Slim Stack Up?

1. Indian Chief Dark Horse

The Chief Dark Horse competes directly with the Slim’s retro appeal but packs a heavier 1811 cc engine and more tech (like ride modes). It’s smoother on highways but feels bulkier in tight spaces.

2. Honda Shadow Phantom

A budget-friendly alternative with a 745 cc V-twin, the Shadow Phantom is lighter and more agile. However, it lacks the Harley’s torque and charisma.

3. Yamaha Bolt R-Spec

Yamaha’s Bolt offers a 942 cc engine and café racer styling. It’s peppier at low speeds but struggles on long hauls compared to the Slim’s relaxed cruising ability.

Verdict: The Softail Slim wins on heritage and that iconic V-twin character, though rivals offer more tech or affordability.

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Maintenance: Keeping Your Slim in Top Shape

The Softail Slim is relatively low-maintenance if you follow Harley’s guidelines:
- Oil Changes: Use SAE 20W-50 every 5,000 km (3,100 mi). Capacity is 4.75 L (5.0 US quarts) with filter.
- Belt Drive: Inspect every 10,000 km (6,200 mi) for tension and wear—no lubrication needed.
- Spark Plugs: Replace NGK CR9EB (standard) or CR9EIX (iridium) every 20,000 km (12,400 mi).
- Brake Fluid: Flush DOT 4 fluid every 2 years.

Pro Tip: Upgrade to synthetic oils and high-performance air filters (available at MOTOPARTS.store) to boost engine longevity and responsiveness.

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Conclusion: Why the Softail Slim Endures

The 2021-2022 Harley-Davidson Softail Slim isn’t just a motorcycle—it’s a statement. From the thunderous exhaust note to the timeless design, it’s a bike that connects you to motorcycling’s golden age while delivering modern reliability. Whether you’re a seasoned rider or new to cruisers, the Slim offers a riding experience that’s hard to replicate.

And when it’s time to personalize or maintain your machine, MOTOPARTS.store has everything from premium NGK spark plugs to high-capacity oil filters—because even legends need a little love.

Ride hard, ride free.

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Specifications sheet

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