| Component | Specification |
|---|---|
| Engine | Milwaukee-Eight 114 (1,868cc) |
| Oil Requirement | SAE 20W-50 (4.7 L / 5.0 qts) |
| Front Tire | 130/60B19 61H (36 psi / 2.48 bar) |
| Rear Tire | 180/55B18 80H (42 psi / 2.90 bar) |
| Battery | 66000174 (YTX30L-BS) |
| Spark Plugs | HD 6R10 (Dual Plug Setup) |
The Harley-Davidson Road Glide Special (FLTRXS) is defined by its iconic frame-mounted “Sharknose” fairing. Unlike the Batwing fairing found on the Street Glide, which is mounted to the forks, the Sharknose is fixed directly to the frame. This engineering choice, which dates back to the 1980 FLT Tour Glide, significantly reduces steering inertia and minimizes the impact of crosswinds on the handlebars, providing unparalleled high-speed stability for long-distance touring.
The Milwaukee-Eight 114 Powertrain
At the heart of the 2019–2023 models is the Milwaukee-Eight 114 V-Twin engine. This 1,868cc powerhouse produces approximately 118 ft-lb of peak torque. From a technical standpoint, the M8 engine features a four-valve per cylinder head design and a dual spark plug configuration (HD 6R10), which optimizes flame propagation and ensures cleaner combustion. This is essential for meeting modern emissions standards while maintaining the traditional ‘Potato-Potato’ cadence via a single chain-driven camshaft.
Essential Maintenance Guide
Lubrication System
For the FLTRXS/114, Harley-Davidson specifies SAE 20W-50 oil. The dry-sump system requires 4.7 Liters for a full service including the filter. At MotoSpecsLab, we recommend checking the oil level when the engine is at operating temperature on its sidestand to ensure an accurate reading.
Chassis and Contact Patch
Stability is paramount for a machine with a curb weight exceeding 850 lbs. The Road Glide Special utilizes 130/60B19 front and 180/55B18 rear tires. Maintaining precise pressure—36 psi (front) and 42 psi (rear)—is critical not just for tread longevity, but for the proper functioning of the Reflex Linked Brembo Brakes with ABS.
Electrical System
The high-compression 114 engine requires significant cold cranking amps (CCA). The OEM 66000174 (YTX30L-BS) battery is a high-capacity unit designed to handle the infotainment system and the heavy starter draw. If the bike is stored for more than two weeks, a dedicated AGM-compatible tender is mandatory to prevent sulfation.
Editor’s Verdict
The Road Glide Special 114 remains the gold standard for riders who prioritize aerodynamic efficiency and aggressive styling. While the maintenance requirements are standard for the touring family, the precision of the frame-mounted fairing offers a technical advantage that fork-mounted competitors simply cannot replicate in turbulent conditions.