| Specification | Value |
|---|---|
| Model Range | 2019-2022 (FLHT/20) |
| Engine Type | Milwaukee-Eight 107 V-Twin |
| Oil Type & Capacity | 20W50 (H-D 360/SYN3); 4.3 – 4.7 Liters |
| Tires (Front/Rear) | 130/80B17 65H / 180/65B16 81H |
| Tire Pressure (PSI) | F: 36 psi / R: 42 psi |
| Battery Part No. | 66000175 |
| Spark Plug Part No. | H-D 60100003 |
The Harley-Davidson Electra Glide Standard (FLHT) holds a unique position in the Grand American Touring lineup as the “Blank Canvas.” Unlike its Chrome-laden siblings, the FLHT/20 was engineered with a specific historical focus: providing a pure, distraction-free riding experience. It famously omitted the Boom! Box infotainment system, replacing the screen with a storage glove box, a move that reduced both electrical complexity and MSRP, making it a favorite for customizers and purists alike.
Engineering Analysis: The Milwaukee-Eight 107
At the core of the FLHT/20 is the Milwaukee-Eight 107 (1746cc) engine. This powerplant represents a significant leap over the previous High Output Twin Cam 103, featuring four-valve cylinder heads and a dual-spark design. The 107 CUI engine is oil-cooled in this configuration, utilizing a high-capacity oil cooler to manage thermal loads across the exhaust valves. This specific variant is known for its smooth power delivery, facilitated by an internal counter-balancer that reduces primary vibration while retaining the characteristic Harley-Davidson pulse.
Maintenance Essentials
To maintain peak performance and the longevity of the Milwaukee-Eight powertrain, adherence to the following technical parameters is mandatory:
1. Lubrication System
The FLHT/20 requires a high-quality 20W50 motorcycle oil. While H-D 360 conventional oil is the factory standard, MotoSpecsLab recommends SYN3 Synthetic for improved thermal stability. The total refill capacity ranges from 4.3 to 4.7 liters depending on filter change and drainage efficiency. Always check the dipstick while the bike is on its jiffy stand (resting position) at operating temperature.
2. Chassis & Contact Patch
Handling on a 800lb+ machine is entirely dependent on tire integrity. The FLHT/20 utilizes Dunlop Harley-Davidson Series bias-belted tires. Maintaining 36 psi in the front and 42 psi in the rear is critical for preventing cupping and ensuring the stability of the Reflex Linked Brembo Braking system.
3. Electrical and Ignition
The ignition system utilizes the H-D 60100003 spark plugs. Given the dual-spark nature of the M8 engine, ensure all four plugs are gapped correctly to factory specifications (0.030-0.035 inches). For battery replacements, the 66000175 provides the necessary Cold Cranking Amps (CCA) to turn over the high-compression V-twin.
Editorial Review: MotoSpecsLab Verdict
The Electra Glide Standard is a masterclass in minimalism. By stripping away the GPS and speakers, Harley-Davidson delivered a lighter front-end feel (less weight on the forks) compared to the Ultra Limited. From a technical standpoint, it is the most “service-friendly” touring model of its era due to the simplified wiring harness. While it lacks the modern “frills,” its mechanical foundation is rock solid.
Frequently Asked Questions
Q: Can I use 10W40 oil in the FLHT/20?
A: It is not recommended unless riding in extremely cold climates. 20W50 is the engineered standard for the air/oil-cooled M8 engine to ensure proper film strength at high operating temperatures.
Q: How often should the spark plugs be replaced?
A: Factory service intervals suggest every 30,000 miles, but for optimal throttle response, MotoSpecsLab suggests inspection every 10,000 miles.