| Component | Specification |
|---|---|
| Engine | Milwaukee-Eight 117 V-Twin |
| Engine Oil | H-D 360 20W50 / SYN3 20W50 (4.3 L) |
| Front Tire | 130/60B19 61H (2.5 bar / 36 psi) |
| Rear Tire | 180/55B18 80H (2.9 bar / 42 psi) |
| Spark Plugs | H-D 6R10 |
| Battery | OEM P/N 66000175 |
Engineering Highlight: The 2021-2023 FLTRXSE represents a pivotal moment in Harley-Davidson’s Custom Vehicle Operations history. It was the first CVO Road Glide to integrate the heavy-breather intake and high-performance camshaft as standard to offset the restrictive exhaust flow required by Euro 5 emissions standards, successfully maintaining a peak torque of 169 Nm without compromising environmental compliance.
The Milwaukee-Eight 117 Powerplant
At the heart of the CVO Road Glide is the 1,923cc (117 ci) Milwaukee-Eight engine. This unit features precision oil/air cooling and four-valve cylinder heads. For the Euro 5 iteration, Harley-Davidson optimized the Engine Control Module (ECM) mapping to manage the thermal load generated by leaner air-fuel ratios. The use of Screamin’ Eagle SYN3 20W50 is highly recommended for these units to provide superior film strength at high operating temperatures.
Reflex Defensive Rider Systems (RDRS)
The FLTRXSE comes standard with a sophisticated electronics suite. This includes Cornering Enhanced Electronic Linked Braking (C-ELB), Cornering Enhanced ABS (C-ABS), and Cornering Enhanced Traction Control System (C-TCS). These systems rely heavily on the integrity of the tire contact patch; therefore, maintaining the exact pressure of 2.5 bar (front) and 2.9 bar (rear) is critical for the IMU (Inertial Measurement Unit) to calculate slip rates correctly.
Maintenance Schedule & Technical Essentials
- Lubrication: The 4.3L oil capacity covers the engine sump. Ensure the bike is at operating temperature before checking the dipstick to avoid overfilling.
- Ignition: The 6R10 spark plugs should be inspected every 8,000 km. Proper gapping is essential to prevent hesitation under heavy load.
- Electrical: The 66000175 battery is a high-CCA (Cold Cranking Amps) unit. Given the high compression of the 117 engine, using a generic battery with lower amperage will lead to premature starter motor wear.
Expert Verdict
The CVO Road Glide FLTRXSE is the pinnacle of the Grand American Touring line. Its engineering balances traditional V-Twin character with modern electronic safeguards. For owners, the longevity of this machine is dictated by strict adherence to high-quality synthetic lubricants and precise tire pressure management.
Frequently Asked Questions
What is the best oil for a Euro 5 CVO?
We recommend Screamin’ Eagle SYN3 20W50. It is formulated to handle the increased heat cycles of the Euro 5 compliant Milwaukee-Eight 117 engine.
How often should I change the spark plugs?
While the manual suggests longer intervals, MotoSpecsLab recommends inspecting the H-D 6R10 plugs every 8,000 km to ensure optimal combustion efficiency.