| Specification | Value |
|---|---|
| Engine Displacement | 1923cc (117 Cubic Inches) |
| Engine Oil | 20W50 (4.3 L) |
| Front Tire | 130/60B19 61H (36 psi / 2.5 bar) |
| Rear Tire | 180/55B18 80H (42 psi / 2.9 bar) |
| Spark Plugs | HD 6R10 |
| Battery | 66010-97D |
The 2018 Harley-Davidson CVO Street Glide (FLHXSE) represents a significant milestone in the Motor Company’s history: it was the first production model to feature the Milwaukee-Eight 117 engine, which at the time of release was the largest displacement, most powerful V-Twin engine ever offered from the factory. This engineering feat delivered approximately 125 ft-lb of peak torque, setting a new benchmark for the Custom Vehicle Operations (CVO) lineup.
Engineering Analysis: The 117 Milwaukee-Eight
The heart of the FLHXSE/18 is the 117 cubic inch powerplant. Unlike the standard 107 or 114 variants, the 117 uses a specific cam profile and increased bore to maximize volumetric efficiency. This high-output engine generates significant heat, making the 4.3-liter oil capacity and the use of high-quality 20W50 synthetic lubricant critical for maintaining thermal stability during long-distance touring.
Chassis and Handling Dynamics
Equipped with a 19-inch front wheel and an 18-inch rear, the CVO Street Glide balances aesthetic appeal with high-speed stability. The tire pressures are strictly specified at 36 psi for the front and 42 psi for the rear to handle the substantial curb weight and the torque output of the 117 engine. The suspension features dual-bending valve technology in the front forks, providing a more controlled damping response compared to previous air-adjustable systems.
Maintenance Guide
- Oil Service: Ensure the use of 20W50 oil. The 4.3L capacity includes the filter change. Inspect for metal particulates in the primary chaincase during every second oil change.
- Electrical: The 66010-97D battery is a high-CCA unit designed to crank the high-compression 117 engine. Maintaining a battery tender during off-season is mandatory for longevity.
- Ignition: Use only HD 6R10 plugs. Given the high-compression nature of the 117, gap precision is vital to prevent pre-detonation or misfires under load.
Frequently Asked Questions
What is the recommended tire pressure for the 2018 CVO Street Glide?
The front tire (130/60B19) should be set to 36 psi (2.5 bar), and the rear tire (180/55B18) requires 42 psi (2.9 bar).
Which battery is required for the FLHXSE/18?
The correct replacement battery is the Harley-Davidson 66010-97D, which provides the necessary cold cranking amps for the large-displacement V-twin.