| Specification | Value |
|---|---|
| Engine | Milwaukee-Eight 114 (1,868cc) |
| Oil Grade | SAE 20W-50 (H-D 360 or Syn3) |
| Oil Capacity | 3.8 L (4.0 US qt) |
| Tires (F/R) | 130/80B17 65H / 180/65B16 81H |
| Tire Pressure | F: 36 psi (2.5 bar) / R: 42 psi (2.9 bar) |
| Battery | 66010-97D |
| Spark Plug | HD-6R10 |
Engineering Highlight: The Shark-Nose Advantage
The 2019 Road Glide Ultra (FLTRU) is defined by its frame-mounted ‘shark-nose’ fairing. Unlike the handlebar-mounted ‘batwing’ fairing found on the Electra Glide, the FLTRU fairing remains independent of steering inputs. This engineering choice reduces the physical weight on the front forks, significantly mitigating wind buffeting at high speeds and providing superior stability during crosswinds—a critical factor for long-haul touring comfort.
Milwaukee-Eight 114: Performance Analysis
The 2019 model year marked the standard inclusion of the Milwaukee-Eight 114 engine for the Ultra series. With 122 ft-lb of torque, this powerplant offers a 5% increase over the previous 107 CUI variant. The dual-spark, four-valve-per-cylinder architecture provides efficient combustion and heat management, though the precision cooling system (oil-cooled heads) remains essential for maintaining longevity in high-load scenarios.
Maintenance Guide & Technical Essentials
Lubrication System
For the FLTRU/19, MotoSpecsLab recommends the use of SAE 20W-50. While H-D 360 Mineral oil is sufficient, the Syn3 Full Synthetic is preferred for the 114 CUI engine to handle the higher thermal loads. The system requires 3.8 liters for a standard change with filter.
Chassis and Contact Patch
Tire integrity is paramount for a machine with a wet weight exceeding 900 lbs. The Dunlop Multi-Tread (MT) tires (130/80B17 front and 180/65B16 rear) must be maintained at 36 psi front and 42 psi rear. Operating below these pressures leads to premature cupping and sluggish low-speed handling.
Electrical & Ignition
The 66010-97D battery provides the high cold-cranking amps (CCA) required to turn over the high-compression 114 V-Twin. We recommend checking the HD-6R10 spark plugs every 5,000 miles for carbon fouling, ensuring the dual-ignition system remains synchronized.
MotoSpecsLab Verdict
The 2019 Road Glide Ultra represents the pinnacle of Harley-Davidson’s traditional touring geometry combined with modern powertrain efficiency. It is a high-authority choice for riders prioritizing aerodynamic stability and low-end torque. Strict adherence to the 5,000-mile service interval is mandatory to preserve the hydraulic lifters and primary chain tensioner integrity.
FAQ
Q: Can I use 10W-40 oil?
A: No. The Milwaukee-Eight 114 is designed for the viscosity of 20W-50 to ensure proper oil pressure and protection at operating temperatures.
Q: What is the spark plug gap for the HD-6R10?
A: The standard gap is 0.031–0.035 in. (0.8–0.9 mm).