Harley-Davidson Softail Slim FLS Buyer's Guide

The Machine's Character

The Softail Slim is a factory bobber, built around a 1690 cc air-cooled 45° V-twin and a chassis that hides the rear suspension so the back end reads as a rigid hardtail. The numbers behind it: 78 hp, 97 lb-ft at 3,200 rpm, a 6-speed box, belt final drive. What defines the bike is stance. A 23.8-inch seat, stripped bodywork, wide Hollywood bars, and almost nothing bolted on that isn't doing visual work. It doesn't chase spec-sheet bragging rights. It chases a silhouette, and it lands it cleanly enough that chopper style is the one dimension where I had nothing to deduct.

On the road it's as calm as it looks. 701 lb wet, a 64.2-inch wheelbase, and a center of gravity low enough that the mass stops mattering the moment you're rolling. Torque arrives early and stays flat, so you short-shift and let the belt do the work. It ages well because there's so little to age: paint, chrome, castings. Build quality is genuinely high, and the parts catalog behind this platform is deep enough to keep an owner busy for years. The honest caveat is heat. The underseat oil tank and rear cylinder push real warmth into your right thigh, and traffic makes it worse.

Hard Numbers

Spec sheets don't ride bikes, but they set the baseline.

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Key specifications
Power	78 hp (58 kW)
Torque	97 lb-ft (132 Nm) @ 3,200 rpm
Displacement	1690 cc
Engine	45° V-twin
Cooling	Air-cooled
Gearbox	6-speed
Final drive	Belt
Fork	Telescopic
Front tire	MT90-16
Rear tire	MU85-16
Wheelbase	64.2 in (1630 mm)
Seat height	23.8 in (604 mm)
Wet weight	701 lb (318 kg)
Fuel capacity	5.0 gal (18.9 L)
Top speed	112 mph (180 km/h)
Fuel economy	42 mpg (US)

Equipment check

Chassis

Rear Suspension Adjustable Standard

Safety

ABS Optional

Known issues

ABS module failure risk

brakes rare

Pre-2014 Harley-Davidson ABS modules can degrade internally due to moisture if brake fluid is not flushed regularly, potentially causing complete brake loss.
Substandard C-series lifters

engine occasional

The factory-installed 'C' series lifters are known to be of lower quality and can fail, causing valvetrain noise and potential engine damage. Replacement with aftermarket lifters is recommended.
Oil tank heat discomfort

cooling common

The underseat oil tank and rear cylinder radiate significant heat to the rider's right thigh, especially at idle. Aftermarket heat shields or a richer fuel mixture can reduce the problem.
Premature compensator wear

drivetrain occasional

The primary chain compensator on early Twin Cam 103 engines can wear prematurely, causing clunking noise and potential damage to the primary drive.

The Expert Benchmark

Where this Harley-Davidson Softail Slim FLS pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.

What kind of bike this is — character vs. the class

Metal-and-Muscle Presence

Rumble & Character

Low-Speed Confidence Despite Mass

Relaxed Boulevard Ergonomics

Living-Machine Feel

Relaxed Torque Authority

This bike Class average

The shape of the Harley-Davidson Softail Slim FLS — numbers and character vs. the average Cruiser

Head-to-head: Harley-Davidson Softail Slim FLS vs. its rivals

Power

78 hp This bike 96 hp Moto Guzzi California 1400 Custom 73 hp Indian Chief 79 hp Yamaha Road Star Warrior 79 hp Suzuki Intruder C1500T

Torque

97 lb-ft This bike 88 lb-ft Moto Guzzi California 1400 Custom 119 lb-ft Indian Chief 100 lb-ft Yamaha Road Star Warrior 97 lb-ft Suzuki Intruder C1500T

Displacement

1690 cc This bike 1380 cc Moto Guzzi California 1400 Custom 1811 cc Indian Chief 1670 cc Yamaha Road Star Warrior 1462 cc Suzuki Intruder C1500T

Wet weight

701 lb This bike 743 lb Moto Guzzi California 1400 Custom 831 lb Indian Chief 644 lb Yamaha Road Star Warrior 800 lb Suzuki Intruder C1500T

Top speed

112 mph This bike 130 mph Moto Guzzi California 1400 Custom

Seat height

23.8 in This bike 29.1 in Moto Guzzi California 1400 Custom 26.0 in Indian Chief 28.5 in Yamaha Road Star Warrior 28.3 in Suzuki Intruder C1500T

The 'Should I Buy It?' Score

Forget spec-sheet bragging. Here's who the Softail Slim FLS is actually built for.

Aerial view of a winding asphalt road cutting through volcanic terrain on La Gomera, Canary Islands. The road curves through sparse green vegetation with rocky volcanic peaks visible in the background and a settled valley to the left. Clear lane markings, dry climate, partly cloudy sky.

Best cruiser for Sturgis?

This is the bike that belongs in that parking lot. Stance, sound, and brand weight are all present, and the parts catalog lets you make it unmistakably yours before the next run.

Made for A1A — Florida Atlantic Coast · Black Hills / Sturgis Rally Hub · Daytona Main Street / Bike Week

Best retro motorcycle for road trips?

Two-lane roads and small towns suit it well. Plan around a 5.0-gallon tank at 42 mpg and a riding position that rewards an unhurried pace rather than a fast one.

Made for Acadia National Park · Austin / Handbuilt Motorcycle Show · Blue Ridge Parkway

Best touring motorcycle for long distance?

Honest answer: not your bike. No cruise control, no heated grips, minimal bodywork, and a 5.0-gallon tank mean you'll plan every day around fuel stops and weather.

Made for Beartooth Highway · Blue Ridge Parkway · Going-to-the-Sun Road

Alternatives to the Harley-Davidson Softail Slim FLS

If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.

Any price note compares both bikes at the same age — the youngest age both have on the used market — against this Harley-Davidson Softail Slim FLS. “cheaper/pricier” is what that bike costs second-hand, not how worn it is.