2022 Harley-Davidson Low Rider ST El Diablo — Milwaukee-Eight 117 Softail Icons Collection

The 2022 Harley-Davidson Low Rider ST El Diablo, officially presented as the Low Rider El Diablo in Harley-Davidson material and commonly searched by enthusiasts as the Low Rider ST El Diablo, was a limited Icons Collection motorcycle based on the FXLRST Low Rider ST platform. It combined the 117-cubic-inch Milwaukee-Eight Softail driveline with a frame-mounted fairing, lockable saddlebags, factory audio, and a hand-finished red fade paint scheme intended to recall the 1983 FXRT Sport Glide.

Its importance is not that it introduced a new engine or chassis. The Low Rider ST had already brought the FXRT-inspired performance-touring silhouette into the modern Softail line. El Diablo mattered because Harley-Davidson turned that idea into a serialized collector edition: 1,500 examples worldwide, a direct visual conversation with the FXRT era, and one of the clearest factory acknowledgments of the West Coast performance-cruiser style that had been developing outside the company for years.

Best Known For: A 1,500-unit Icons Collection Low Rider ST variant with Milwaukee-Eight 117 power, FXRT-inspired bodywork, special El Diablo red fade paint, and factory-installed Harley-Davidson Audio powered by Rockford Fosgate.

Quick Facts

The El Diablo is best understood as a special-edition Low Rider ST rather than a separate engineering branch. The table below separates the documented mechanical base from the edition-specific identity that gives the motorcycle its collector relevance.

The quick specification sheet explains why the motorcycle attracts two overlapping audiences: riders who want the most assertive factory Low Rider ST specification of its model year, and collectors who value limited-production Harley-Davidson factory specials with clear visual and documentary differences.

Why the Low Rider ST El Diablo Matters

The El Diablo arrived at a moment when Harley-Davidson was recalibrating its performance-cruiser identity around the Milwaukee-Eight Softail platform. The Dyna line had ended after 2017, and the 2018-on Softail chassis had to serve riders who still wanted the stripped aggression of the FXD/FXR lineage without returning to the older twin-shock architecture.

The standard Low Rider ST answered much of that demand by pairing the Milwaukee-Eight 117 with a frame-mounted fairing and saddlebags. El Diablo added something different: a factory collector narrative. Rather than simply blacking out a standard model or adding catalog accessories, Harley-Davidson used the Icons Collection to frame the machine as a modern reinterpretation of the 1983 FXRT Sport Glide, one of the most distinctive FXR-platform motorcycles of the early Evolution era.

For collectors, that connection matters. The FXRT was once an oddball in the showroom: a sport-touring idea built on an FXR chassis, with a frame-mounted fairing and hard luggage in a company better known at the time for traditional cruisers and touring rigs. Decades later, its purposeful stance became desirable among riders building fast, functional Harleys. The El Diablo is the factory looking back at that evolution and giving it a serialized, paint-led, modern Softail expression.

Historical Context and Development Background

The Low Rider ST family belongs to the Milwaukee-Eight Softail generation introduced after Harley-Davidson consolidated much of the Dyna personality into the new Softail platform. That change was controversial among traditionalists, but mechanically it gave Harley-Davidson a stiffer chassis, a hidden monoshock rear suspension layout, and the ability to package larger Milwaukee-Eight engines into a cleaner, more controlled performance-cruiser format.

By 2022, the performance-cruiser conversation was not only about factory horsepower claims. It was about stance, braking, cornering clearance, fairing stability, luggage capacity, and the club-style vocabulary that had grown from California custom culture, FXR appreciation, Dyna development, and long-distance fast road riding. The Low Rider ST sat squarely in that territory, with the El Diablo functioning as the art-finished, limited-production version.

The direct historical reference was the 1983 FXRT Sport Glide. That machine used the FXR chassis and a frame-mounted fairing, placing it closer in concept to a sporting, practical road bike than to a conventional cruiser. The 2022 El Diablo did not recreate the FXRT mechanically; it translated the visual idea through the Softail frame, Milwaukee-Eight 117 engine, modern brakes, ABS, factory electronics, and a contemporary audio system.

Harley-Davidson’s Icons Collection was also important in positioning the bike. The program was created for limited-production models that reinterpret significant Harley-Davidson designs rather than simply reviving old names. In that context, El Diablo was not merely a paint option. It was a numbered factory statement about what the FXRT idea had become in the Milwaukee-Eight era.

Engine and Drivetrain

The El Diablo used the Milwaukee-Eight 117, the largest displacement production engine available in the regular Harley-Davidson cruiser line at the time. It is a 45-degree V-twin with four valves per cylinder, pushrod valve actuation, hydraulic lifters, electronic sequential port fuel injection, and the characteristic Milwaukee-Eight single-cam architecture.

Harley-Davidson published torque rather than horsepower for this engine in its factory specifications. For that reason, horsepower is not treated here as a primary documented factory figure. The relevant factory number is the 125 lb-ft torque rating, quoted at 3,500 rpm in U.S. specification material.

The important point is the breadth of the engine rather than any dyno-room headline. In this chassis the 117 gave the Low Rider ST platform a deeper torque reserve than the earlier 114-equipped Softails, which suited the motorcycle’s intended use: hard two-lane riding, loaded day trips, and the sort of roll-on acceleration that defines modern big-twin road performance.

Chassis, Suspension, and Braking

The El Diablo used the post-2018 Softail chassis, a tubular-steel frame with a concealed rear monoshock that allowed Harley-Davidson to preserve a traditional hardtail visual line while delivering far better control than the old rigid-frame silhouette suggests. It was not an FXR frame, and that distinction matters. The El Diablo visually referenced the FXRT, but structurally it was a Milwaukee-Eight Softail.

The frame-mounted fairing was central to the motorcycle’s identity. Unlike a fork-mounted screen, the fairing did not turn with the bars, which helped give the ST family its FXRT-like profile and a more stable feel at road speed. The saddlebags made the bike genuinely useful rather than a styling exercise, while the factory Rockford Fosgate audio system gave the El Diablo a clear equipment difference from the standard Low Rider ST.

Those specifications show the El Diablo for what it is: a heavy, torque-rich road motorcycle with more chassis intent than a conventional cruiser and more visual drama than the standard ST. The 19-inch front and 16-inch rear wheel pairing preserved the Low Rider stance, while the inverted fork and dual front discs signaled Harley-Davidson’s attempt to give the machine credible high-speed road manners.

Riding Experience and Mechanical Character

The El Diablo starts like a modern injected Harley rather than a carbureted FXR: keyless security behavior, thumb starter, immediate idle control, and no enrichment ritual beyond the motorcycle’s electronics. Yet the mechanical feel remains unmistakably big-twin. The Milwaukee-Eight 117 settles into a heavy, rubber-isolated pulse, with less raw shake than earlier solid-mounted big twins but enough combustion rhythm to keep the machine from feeling anonymous.

Throttle response is defined by torque rather than revs. The 117 pulls cleanly from low engine speeds and gives the rider a broad middle range where passing traffic or climbing grades rarely requires drama. The six-speed gearbox has the deliberate engagement expected of a large Harley-Davidson transmission, and the belt final drive keeps the driveline clean and quiet compared with chain-driven performance customs.

At speed, the frame-mounted fairing is the motorcycle’s defining sensory feature. It gives the front of the bike a fixed, planted visual reference, unlike a fork-mounted fairing that moves with steering input. On a fast road the rider feels more wind management than on a naked Low Rider S, but without the full envelope of a Road Glide or Street Glide touring machine.

The braking package is a major part of the ST identity. Dual front discs and ABS do not make a 721 lb motorcycle behave like a sport bike, but they give the rider more confidence than a single-disc cruiser setup when the 117 is being used as intended. Low-speed handling still carries the mass and wheelbase of a big Harley, though the mid-control layout and narrow waist of the Softail platform keep it more manageable than its visual bulk suggests.

Identification and Originality

Correct identification begins with understanding that El Diablo is not merely a repainted owner-modified Low Rider ST. It was a factory Icons Collection model, commonly associated with the FXRST code, built in a documented run of 1,500 examples worldwide. A genuine example should have documentation supporting its Icons Collection status, its original El Diablo paintwork, and its factory equipment package.

The most visible identity markers are the red fade paint scheme, the special striping treatment, the frame-mounted fairing, saddlebags, blacked-out powertrain, and factory-installed Harley-Davidson Audio powered by Rockford Fosgate. Surviving examples should also be checked for the serialized Icons Collection identification used on the model. Because the base Low Rider ST is a natural platform for accessory changes, collectors should separate reversible owner personalization from changes that disturb the original El Diablo package.

Original paint is especially important. Harley-Davidson positioned the El Diablo finish as a major part of the motorcycle’s value, and the paint was not a normal catalog color. Refinished tins, substituted saddlebags, aftermarket fairing work, or missing audio components reduce the evidentiary strength of the bike as a complete Icons Collection example, even if the mechanical platform remains correct.

Frame and engine identification should be checked against the motorcycle’s title, service history, sales invoice if available, and Harley-Davidson dealer records where possible. Avoid unsupported decoding shortcuts from internet lists when evaluating a high-value limited edition; the paperwork trail is part of the motorcycle.

Model Code and Variant Breakdown

The Low Rider ST El Diablo sits close enough to the standard Low Rider ST that buyers often confuse the two. The following table clarifies the nearby factory models and the historical machine that supplied the visual reference point.

The table also shows why terminology matters. In collector conversation, El Diablo is often treated as a Low Rider ST special because its architecture and equipment closely follow the ST concept, but the factory special-edition identity is Low Rider El Diablo.

Performance and Dimensional Specifications

Harley-Davidson’s factory data gives enough to define the machine without relying on magazine test extrapolations. The meaningful figures are displacement, torque, weight, fuel capacity, wheel sizes, and the presence of the 117 engine. Factory horsepower was not the headline number in Harley-Davidson’s published specification format for this model, and top speed or acceleration claims should not be treated as fixed collector data.

Commonly documented factory figures include a 1,923 cc Milwaukee-Eight 117 engine, 125 lb-ft of torque at 3,500 rpm, a 6-speed Cruise Drive transmission, belt final drive, 5.0-gallon fuel capacity, and a running order weight listed at 721 lb. Exact real-world acceleration varies with rider weight, altitude, break-in condition, tire condition, and any tuning changes, so it is best left out of serious identification or valuation discussions.

Compared With Related Harley-Davidson Models

El Diablo vs. Standard 2022 Low Rider ST

The standard Low Rider ST is the mechanical foundation: Milwaukee-Eight 117, frame-mounted fairing, bags, inverted fork, dual front brakes, and Softail chassis. El Diablo adds the limited-production Icons Collection identity, special paint, factory audio package, and the collectible documentation that follows a numbered special edition.

For riders, the difference is largely equipment, finish, and ownership psychology. For collectors, the difference is much larger. A modified standard FXLRST can look similar from a distance, but it will not carry the factory El Diablo status or the same market attention.

El Diablo vs. Low Rider S

The Low Rider S is the leaner performance-cruiser sibling. It shares the same broad performance ethos and, for 2022, the 117 engine, but it lacks the ST’s frame-mounted fairing and saddlebags in standard configuration. The S feels more stripped and visually closer to the Dyna/FXD performance-cruiser lineage, while the ST and El Diablo lean harder into FXRT-inspired long-road functionality.

El Diablo vs. 1983 FXRT Sport Glide

The FXRT comparison is conceptual rather than mechanical. The 1983 FXRT was an FXR-based sport-touring Harley with a frame-mounted fairing and luggage at a time when that combination was unusual in the Motor Company’s lineup. The El Diablo uses the Softail platform and Milwaukee-Eight power, but it deliberately borrows the FXRT silhouette: fixed fairing, bags, low stance, and a purposeful road-bike attitude.

Restoration and Ownership Notes

Because the El Diablo is a modern motorcycle, restoration usually means preservation, correction, or sympathetic recommissioning rather than the full archaeology required by prewar or early postwar Harleys. Mechanical parts support for the Milwaukee-Eight Softail platform is strong, and ordinary service components are not the problem. The difficult pieces are the edition-specific finish, serialized trim, factory audio integration, and unmodified bodywork.

Engine rebuild considerations are those of the Milwaukee-Eight 117 family: careful attention to oiling condition, cam-chest work if modifications have been performed, proper tuning after exhaust or intake changes, and documentation of any internal upgrades. Many Low Rider STs are modified early in life, often with exhaust systems, air cleaners, cams, handlebars, suspension parts, and audio changes. On an El Diablo, those changes may improve the riding experience but can weaken collector originality.

Paint repair deserves special caution. The El Diablo finish is central to the motorcycle’s identity, and a poor repaint is more damaging to collector confidence than ordinary wear. If tins, bags, or fairing parts have been replaced, the buyer should ask why and should verify whether original parts accompany the motorcycle.

Buyer and Restoration Inspection Points

A serious inspection should begin with the limited-edition identity and then move to the mechanical condition. A low-mile example with missing El Diablo components is not automatically more desirable than a ridden example with complete documentation and original paint.

For a collector-grade example, paperwork and completeness matter as much as mileage. The best motorcycles are those that can tell a clean story: original selling dealer, edition documentation, service records, unmolested paint, and any removed factory parts retained with the sale.

Collector and Market Relevance

The El Diablo occupies a favorable collector niche because it has three traits that Harley-Davidson limited editions need: a finite production run, visible factory-only identity, and a meaningful historical reference. The 1,500-unit production number is large enough that examples can be found, but small enough to keep the model distinct from a normal color-and-trim variation.

Its market relevance also benefits from the renewed enthusiasm for FXR and FXRT-style Harleys. Original FXRTs, once treated as awkward touring-adjacent oddities, have become reference points for riders who value high-speed stability, fairing function, and luggage without the mass of a full touring chassis. The El Diablo does not replace an FXRT in a collection, but it gives that story a modern factory chapter.

Collectors typically value original paint, documentation, low but believable mileage, complete factory audio, unmodified bodywork, and the presence of take-off parts if performance accessories were installed. Highly customized examples may be excellent riders, but the El Diablo’s long-term distinction is tied to its factory specification.

Cultural Relevance

The Low Rider ST El Diablo sits at the junction of factory Harley-Davidson design and the performance-cruiser culture that matured outside the factory. Its stance, fixed fairing, hard bags, blacked-out mechanical package, and big-inch torque all speak to a style of Harley built for fast road miles rather than boulevard posing.

The historical signal is the FXRT Sport Glide, but the cultural signal is broader. The El Diablo acknowledges the riders who turned FXRs, Dynas, and later Softails into tall-bar, fairing-equipped, brake-upgraded road weapons. Harley-Davidson did not invent that movement with the ST; it absorbed enough of it to build a production motorcycle that looked intentional rather than improvised.

FAQs

Is the 2022 Harley-Davidson Low Rider ST El Diablo the same as the standard Low Rider ST?

No. It is based on the Low Rider ST concept and shares the Milwaukee-Eight 117 Softail architecture, but the El Diablo was a 2022 Icons Collection special edition with its own limited-production identity, special paint, serialized collector status, and factory-installed Harley-Davidson Audio powered by Rockford Fosgate.

How many Low Rider El Diablo motorcycles were built?

Harley-Davidson documented the Low Rider El Diablo as limited to 1,500 examples worldwide. That limited run is one of the central reasons the model is treated differently from a normal Low Rider ST.

What engine is in the Low Rider ST El Diablo?

It uses the Milwaukee-Eight 117, a 1,923 cc air/oil-cooled 45-degree V-twin with four valves per cylinder. Harley-Davidson published a factory torque rating of 125 lb-ft at 3,500 rpm for this engine.

What is the model code for the Low Rider ST El Diablo?

The standard Low Rider ST is associated with FXLRST, while the 2022 Icons Collection Low Rider El Diablo is commonly associated with FXRST. Buyers should verify the motorcycle through title records, VIN-related documentation, dealer paperwork, and the Icons Collection serialized identification rather than relying only on appearance.

Why does Harley-Davidson connect the El Diablo with the FXRT?

The El Diablo was styled as a modern homage to the 1983 FXRT Sport Glide, a distinctive FXR-platform Harley with a frame-mounted fairing and luggage. The 2022 bike is mechanically a Softail, not an FXR, but the silhouette and touring-performance attitude deliberately reference the FXRT.

Is horsepower available for the 2022 Low Rider ST El Diablo?

Harley-Davidson’s factory specifications emphasized torque rather than horsepower for this model. Serious reference material should use the documented factory torque figure and avoid treating non-factory dyno results as universal specifications.

What hurts El Diablo collector value most?

Missing documentation, refinished or mismatched bodywork, absent factory audio, replaced saddlebags or fairing parts, and heavy undocumented engine modification are the main concerns. On this model, the special paint and complete factory package are a large part of the motorcycle’s collector identity.

Collector Takeaway

The 2022 Harley-Davidson Low Rider ST El Diablo matters because it is a factory-built snapshot of where Harley performance-cruiser culture had moved: away from simple chrome-and-rumble nostalgia and toward torque, fairing stability, bags, brakes, and a harder roadgoing stance. It is not an FXRT revival in the mechanical sense, and it should not be judged as one. Its real significance is that Harley-Davidson recognized the FXRT idea as desirable again and translated it through the Milwaukee-Eight Softail platform.

For the collector, the El Diablo is strongest when left close to the way it left the factory: serialized, documented, red-fade painted, audio-equipped, and complete. For the rider, it remains one of the most charismatic early Low Rider ST variants because the mechanical package has real use behind the theater. The best examples will be valued not simply because they are limited, but because they preserve a very specific moment when Harley-Davidson looked at its own fringe history and the custom culture built around it, then answered with a 117-inch factory motorcycle.