| Component | Specification |
|---|---|
| Engine | Milwaukee-Eight 114 (1868cc) |
| Oil Grade/Capacity | H-D 360 20W50 / 4.7 Liters (5.0 qts) |
| Front Tire | MT90B16 72H (36 psi / 2.48 bar) |
| Rear Tire | 180/65B16 81H (42 psi / 2.90 bar) |
| Battery | OEM Part #66000175 |
| Spark Plugs | Harley-Davidson 6R10 |
The 2021 Harley-Davidson Electra Glide Revival (FLH) holds a prestigious position in motorcycling history as the inaugural model of the “Icons Collection.” This specific engineering exercise was designed to recreate the 1969 aesthetic—the first year the iconic “batwing” fairing was offered as an accessory—while integrating the modern Milwaukee-Eight 114 powertrain. Notably, it was the first Harley-Davidson to pair vintage-inspired aesthetics like the solo coil-sprung saddle with the full suite of Reflex Defensive Rider Systems (RDRS) electronics.
Engineering & Euro 5 Compliance
To meet the stringent Euro 5 emission standards, Harley-Davidson refined the Milwaukee-Eight 114’s combustion cycle. This involved sophisticated oxygen sensor feedback and a high-efficiency exhaust system that manages heat without compromising the signature V-Twin cadence. The FLH chassis provides the necessary stability for long-range touring, supported by 49mm Dual Bending Valve front forks and premium emulsion rear shocks with hand-adjustable preload.
Maintenance Guide & Fluid Dynamics
Maintaining the Electra Glide Revival requires precision, particularly regarding its oiling system. The Milwaukee-Eight engine utilizes a dry-sump system with a 4.7-liter capacity. At MotoSpecsLab, we recommend the Harley-Davidson 360 20W50 mineral or synthetic oil to ensure optimal viscosity across the wide operating temperatures typical of air/oil-cooled engines.
Tire & Contact Patch Management
The Revival utilizes a unique combination of a MT90B16 front and a wide 180/65B16 rear tire. Given the bike’s significant wet weight, maintaining correct pressures is critical for handling and tire longevity. Under-inflation on the rear tire (below 42 psi) can lead to excessive heat buildup and “cupping” of the tread, significantly impacting the stability of the touring frame.
Electrical & Ignition Systems
The electrical heart of the Revival is the 66000175 battery, a high-CCA (Cold Cranking Amps) unit essential for turning over the high-compression 114ci cylinders. For ignition, the 6R10 spark plugs are specifically gapped to handle the lean-burn conditions necessitated by Euro 5 mapping. We recommend inspecting plugs every 8,000 km for carbon deposits or electrode erosion.
Editor’s Technical Verdict
The Electra Glide Revival is more than a nostalgia piece; it is a masterclass in modernizing a classic silhouette. From a service perspective, the FLH platform remains accessible for the home mechanic, provided the technician respects the torque specifications and fluid requirements outlined in this guide. It represents the pinnacle of Harley-Davidson’s current touring technology wrapped in a 1969 Birch White and Hi-Fi Blue package.