2022-2023 Harley-Davidson FLHXST Street Glide ST: Milwaukee-Eight 117 Performance Bagger

The Harley-Davidson FLHXST Street Glide ST was the sharp-edged, short-lived performance member of the Street Glide family before the 2024 Touring-platform restyle. Introduced for 2022 and continued for 2023, it put the Milwaukee-Eight 117 into a regular-production fork-mounted-fairing bagger, giving the Street Glide line a factory hot-rod identity below the CVO tier. It was not a stripped club bike and not a full-dress tourer; it was Harley-Davidson reading the performance-bagger moment and answering with a 117-cubic-inch Grand American Touring model.

Best Known For: the FLHXST Street Glide ST is best known as the pre-2024 Street Glide performance bagger with the Milwaukee-Eight 117, blacked-out ST trim, solo-seat stance, and direct cultural connection to the King of the Baggers era.

Quick Facts

The Street Glide ST is often researched alongside the Street Glide Special, Road Glide ST, and CVO Street Glide. The key point is that FLHXST denotes the fork-mounted-fairing ST variant, not simply a blacked-out Street Glide Special with badges.

The table shows why the FLHXST matters to buyers: its defining feature is not paint or audio equipment, but the combination of the 117 engine, Street Glide fairing layout, and ST-specific attitude within the Milwaukee-Eight Touring generation.

Why It Matters

The Street Glide ST arrived when the American bagger had become a performance object rather than merely a long-distance motorcycle with hard luggage. MotoAmerica's King of the Baggers series, Harley-Davidson's Screamin' Eagle racing program, and the aftermarket's appetite for tall bars, big-inch motors, suspension, and brakes had changed the way riders looked at FL touring bikes. The FLHXST was Harley-Davidson's production answer: a factory bagger with the largest regular-production Milwaukee-Eight then used outside the CVO orbit.

Its importance is also temporal. The 2022-2023 FLHXST sits at the end of the long-running batwing Street Glide visual language before the substantially revised 2024 Street Glide. For collectors and marque historians, that makes it a clean two-year snapshot of the pre-redesign performance-bagger moment.

Historical Context and Development Background

By the early 2020s, Harley-Davidson's Touring line carried the company's most profitable and culturally visible motorcycles. The Street Glide, with its fork-mounted batwing fairing and low-slung hard bags, had become the default modern Harley bagger shape. The Road Glide drew riders who preferred a frame-mounted fairing; the Street Glide remained the more traditional, handlebar-connected touring experience.

The ST suffix gave Harley-Davidson a way to speak directly to riders influenced by West Coast performance-bagger culture without abandoning factory touring usability. The formula was straightforward but effective: Milwaukee-Eight 117 power, dark finishes, a solo seat, low-profile crash bar treatment, bronze-toned mechanical highlights on some finishes, Prodigy wheels, infotainment, hard bags, and a pared-back stance. The motorcycle was still heavy and unmistakably Touring-family Harley-Davidson, but its specification made clear that it was not simply a chrome cruiser with saddlebags.

Competition came from two directions. Indian's Challenger and Chieftain lines offered liquid-cooled and air-cooled bagger alternatives, while Harley-Davidson's own Road Glide ST competed for the same performance-touring rider. The FLHXST mattered because it retained the canonical Street Glide silhouette while giving buyers the factory 117 engine and ST image without stepping into CVO cost, paintwork, and trim expectations.

Engine and Drivetrain

The Milwaukee-Eight 117 is the mechanical center of the Street Glide ST. It is a 45-degree V-twin with four valves per cylinder, pushrod actuation, hydraulic lifters, electronic sequential-port fuel injection, and air/oil cooling. Harley-Davidson published torque for the engine but did not publish an official horsepower figure for the model, so horsepower claims should be treated as dynamometer-dependent rather than factory specification.

The 117 used a larger bore and stroke than the smaller Milwaukee-Eight Touring engines and gave the ST a broader, heavier torque curve than the 107 and 114 models. Primary drive is by chain inside the primary case, the clutch is a wet multiplate unit with assist-and-slip function, and the gearbox is Harley-Davidson's six-speed Cruise Drive. Final drive is by belt, consistent with modern Harley Touring practice.

For a buyer, the important distinction is that the FLHXST was delivered from the factory with the 117 rather than being a 107 or 114 model later upgraded with Screamin' Eagle parts. That matters for documentation, resale, emissions compliance in some markets, and originality.

Chassis, Suspension, and Braking

The FLHXST uses Harley-Davidson's Touring chassis architecture with a rubber-mounted powertrain. The frame lineage traces to the modern Touring platform revision introduced for the 2009 model year, though the Street Glide ST belongs to the Milwaukee-Eight generation. The chassis gives the motorcycle its familiar bagger proportions: long wheelbase, low bags, broad front fairing, and a heavy but planted feel at highway speed.

The fork-mounted batwing fairing is central to the Street Glide identity. Unlike the Road Glide ST's frame-mounted sharknose fairing, the Street Glide fairing turns with the handlebars, which changes the sensation at parking-lot speed and in crosswinds. Suspension equipment was Touring-family rather than full race hardware: a 49 mm dual-bending-valve fork and rear emulsion shocks, with braking handled by dual front discs and a rear disc with ABS-equipped Touring hardware.

The chassis equipment underlines the ST's real-world role. It was a performance-influenced road bagger, not a homologation special with track suspension and high-clearance bodywork. The factory specification left obvious room for the aftermarket, which is exactly where much of the performance-bagger scene lives.

Riding Experience and Mechanical Character

The FLHXST starts like a modern touring Harley: proximity fob present, ignition enabled, run switch on, starter button pressed, and the 117 settles into a dense, rubber-mounted idle rather than the raw shake of an older rigid-mount Big Twin. The electronic throttle, fuel injection, and hydraulic lifters make the engine far more civilized than the visual language suggests. It still has the slow pulse and primary-drive presence that riders expect from a big Harley, but the Milwaukee-Eight is smoother, quieter mechanically, and more thermally managed than the Twin Cam engines that preceded it.

On the road, the defining sensation is torque rather than revs. The 117 pulls heavily from low engine speed, and the six-speed gearbox suits relaxed but forceful acceleration. The clutch is manageable for the size of the machine, and the belt final drive removes the lash and maintenance ritual associated with chain-drive touring motorcycles.

The fork-mounted fairing gives the Street Glide ST a different feel from the Road Glide ST. At low speed the rider is always aware of the fairing mass moving with the bars, while at highway speeds the bike has the long-wheelbase steadiness expected of the Touring frame. Braking performance is adequate for the machine's weight when maintained correctly, though riders coming from lighter sport-tourers will notice the mass and the need for deliberate inputs.

Identification and Originality

Correct identification starts with the model code: FLHXST. FLHX identifies the Street Glide line, while ST denotes the performance-bagger trim introduced for this period. A true Street Glide ST should not be confused with an FLHXS Street Glide Special fitted with a 117 kit, a solo seat, and black trim.

Factory-correct visual cues include the fork-mounted batwing fairing, hard saddlebags, solo seat, dark finishes, Prodigy cast wheels, Heavy Breather-style intake treatment, and Milwaukee-Eight 117 badging. Surviving examples are frequently modified with exhausts, camshafts, tuners, taller handlebars, aftermarket audio, stretched bags, suspension kits, and custom paint. Those changes may make a better rider's bike, but they reduce the value of the machine as an original reference example unless the stock parts and documentation remain with it.

Documentation matters because many Harley-Davidson Touring models are personalized early in life. A buyer should look for the factory VIN label, matching title information, original sales paperwork when available, owner manual, security fobs, factory parts removed during modifications, and any dealer-installed Screamin' Eagle work listed on receipts. Avoid unsupported decoding claims from sellers; the factory model code and documentation are stronger evidence than appearance alone.

Model Code and Variant Breakdown

The FLHXST was a specific model code, but it sits in a group of closely related Harley-Davidson baggers that buyers often cross-shop or confuse. The table below separates the ST from adjacent Street Glide and Road Glide variants.

There was no military or police FLHXST version that defines the model's collector identity. Its historical relevance is civilian, commercial, and cultural: the factory performance-bagger response to a scene that had already been building in garages, dealerships, and race paddocks.

Performance and Dimensional Specifications

Harley-Davidson published torque, displacement, bore and stroke, compression ratio, fuel capacity, tire sizes, and running-order weight for the Street Glide ST. The commonly cited factory torque figure is 127 lb-ft at 3750 rpm. Official horsepower was not published by Harley-Davidson for this model, and independent dynamometer readings vary with test method, correction factor, exhaust, intake, and calibration.

The motorcycle's running-order weight is listed at 842 lb. That number is essential when evaluating brakes, suspension, and low-speed handling: the FLHXST is powerful and responsive for a Touring Harley, but it remains a full-size bagger with hard luggage, fairing, audio equipment, and a large fuel load.

Compared With Related Models

Street Glide ST vs Street Glide Special

The Street Glide Special is the model most often mistaken for the ST because both share the batwing profile and premium bagger presentation. The decisive difference is specification: the FLHXST was factory-built around the Milwaukee-Eight 117 and ST treatment, while the FLHXS Street Glide Special of the period was typically associated with the Milwaukee-Eight 114. A modified Special may be faster, but it is not the same collector object as a documented FLHXST.

Street Glide ST vs Road Glide ST

The Road Glide ST is the closest mechanical sibling. Both used the Milwaukee-Eight 117 and the ST performance-bagger idea, but the Road Glide's frame-mounted sharknose fairing changes the riding feel and visual language. Riders who prefer a lighter feel at the handlebar and more isolated fairing mass often favor the Road Glide ST; riders who want the classic batwing Street Glide experience gravitate to the FLHXST.

Street Glide ST vs CVO Street Glide

The CVO Street Glide is the factory-custom flagship, with paint, audio, trim, and high-end equipment defining the purchase. The Street Glide ST is more direct and less ornate. For collectors, that distinction matters: the CVO appeals as a premium factory-custom artifact, while the ST appeals as the cleaner performance-bagger statement.

Restoration and Ownership Notes

Because the FLHXST is a modern Harley-Davidson Touring model, parts availability is strong through Harley-Davidson dealers, the Screamin' Eagle catalog, and the enormous aftermarket. The challenge is not finding parts; it is determining which parts are correct for an original ST and which are later personalization items. Exhaust systems, engine calibrations, handlebars, suspension components, seats, audio upgrades, lighting, and bodywork are the most commonly altered areas.

Mechanically, inspection should focus on service records, oil-change discipline, signs of heat abuse, condition of the compensator and primary drive, clutch operation, belt condition, brake maintenance, tire age, and whether engine modifications were tuned properly. Camshaft, exhaust, and intake upgrades are common on 117-inch Milwaukee-Eight baggers, but documentation and calibration quality matter more than the parts list itself.

For restoration to factory configuration, the hardest task may be reversing personalization. Original mufflers, air-cleaner components, seat, mirrors, bars, lighting, wheels, and paintwork should be valued when they accompany the bike. A heavily customized FLHXST can be an excellent rider, but a stock or lightly modified example with factory documentation will be easier to evaluate as a collector-grade motorcycle.

Buyer and Restoration Inspection Points

A Street Glide ST inspection should be more specific than a generic used-Harley walkaround. The best examples are documented, correctly coded, and not so modified that their factory identity has been obscured.

The strongest purchase is not always the lowest-mileage motorcycle. A well-serviced FLHXST with reversible upgrades, original parts, and clean documentation is often a better long-term proposition than a cosmetically perfect bike with unclear engine work.

Collector and Market Relevance

The Street Glide ST's collector relevance rests on three points: short production span, factory 117 engine, and pre-2024 Street Glide body style. Exact production numbers are not consistently published in a way that allows precise rarity claims, so the better argument is specification and context rather than low-number mythology. The FLHXST is desirable because it captures a very specific Harley-Davidson moment.

Collectors typically value unmodified or tastefully reversible examples, complete documentation, correct factory paint, original exhaust and intake parts, and evidence that performance upgrades were carried out professionally. The 2023 Fast Johnnie Enthusiast Collection version adds an additional paint-and-graphics collecting angle for buyers who value factory appearance packages. Conversely, stretched aftermarket bodywork, unknown engine internals, missing take-off parts, and undocumented tuning can narrow the buyer pool.

Cultural Relevance

The FLHXST belongs to the performance-bagger culture that moved from custom shops into mainstream Harley-Davidson marketing and racing visibility. King of the Baggers did not turn the Street Glide ST into a race replica in a strict homologation sense, but it helped create the climate in which a 117-inch factory bagger made obvious commercial sense. The motorcycle's stance, dark finish, solo seat, and torque-first specification reflect that shift.

It also sits in the broader Street Glide story. The FLHX line helped define the modern American bagger as a style object: batwing fairing, hard bags, low rear profile, audio, and long-distance usability. The ST version sharpened that identity by making performance part of the factory narrative rather than leaving it entirely to the aftermarket.

FAQs

What years was the Harley-Davidson FLHXST Street Glide ST produced?

The FLHXST Street Glide ST was offered for the 2022 and 2023 model years in the pre-2024 Street Glide generation.

What engine is in the 2022-2023 Street Glide ST?

It uses the Milwaukee-Eight 117, an air/oil-cooled 45-degree V-twin displacing 117 cu in, or 1923 cc. Harley-Davidson published 127 lb-ft of torque at 3750 rpm for the model.

Did Harley-Davidson publish horsepower for the FLHXST?

Harley-Davidson did not publish an official horsepower figure for the Street Glide ST. Independent dynamometer figures vary and should not be treated as factory specification.

How do I identify a real Street Glide ST rather than a modified Street Glide Special?

Confirm the FLHXST model code through the title, factory label, and original documentation. A modified FLHXS Street Glide Special may look similar, but the factory ST identity is tied to the model code and original 117 specification.

What is the difference between the Street Glide ST and Road Glide ST?

Both use the Milwaukee-Eight 117 and ST performance-bagger concept, but the Street Glide ST has a fork-mounted batwing fairing while the Road Glide ST has a frame-mounted sharknose fairing. That difference changes both appearance and steering feel.

Is the Street Glide ST collectible?

It has clear collector interest as a two-year pre-2024 factory 117 Street Glide variant. The most desirable examples are documented, lightly modified or stock, and accompanied by original take-off parts.

What are common issues when buying a used FLHXST?

The most important concerns are undocumented engine work, poor tuning after exhaust or cam changes, missing original parts, altered suspension, damaged Touring bodywork, and unclear service history. The motorcycle is modern and well supported, but heavy modification can complicate ownership.

Collector Takeaway

The 2022-2023 FLHXST Street Glide ST matters because it fixed a particular moment in Harley-Davidson history: the point when the factory stopped merely watching performance-bagger culture and put a 117-inch Street Glide into the regular showroom. It is not rare in the prewar sense, not a racing homologation special, and not a CVO jewelry box. Its importance is cleaner than that: big factory motor, batwing silhouette, short production window, and the last pre-2024 Street Glide shape.

For the serious Harley collector, the right FLHXST is a documented, minimally disturbed example that still reads as Harley-Davidson built it. For the rider, it is one of the most direct Milwaukee-Eight Touring baggers of its period. Either way, the Street Glide ST earns its page because it is the factory performance bagger distilled to the form most riders recognize instantly: a blacked-out batwing Harley with the 117 doing the talking.