| Specification | Data |
|---|---|
| Model Years | 2019-2023 |
| Engine | Milwaukee-Eight 114 V-Twin |
| Oil Type & Capacity | H-D 360 20W50 / 4.7 L |
| Front Tire | MT130/60B19 61H (36 psi) |
| Rear Tires | P205/65R15 92T (26 psi) |
| Battery OEM | 66000175 (65989-97E) |
| Spark Plugs | H-D 6R10 |
Engineering Highlight: Unlike traditional trike conversions, the FLRT Freewheeler chassis was engineered from the ground up by Harley-Davidson to balance the high torque of the Milwaukee-Eight 114 engine with a unique steering geometry. A key technical differentiator for the 2019-2023 era is the integration of the Reflex™ Defensive Rider Systems (RDRS), which employs advanced cornering-enhanced electronic brake control and traction control specifically calibrated for the three-wheel footprint.
Technical Analysis: The Milwaukee-Eight 114 Powertrain
The heart of the FLRT/23 is the 114 cubic inch (1,868cc) Milwaukee-Eight engine. This powerplant delivers 122 ft-lb of peak torque, critical for overcoming the inertia of a three-wheeled platform. The 4-valve per cylinder design improves volumetric efficiency over the previous Twin Cam models, while dual spark plugs ensure complete combustion and reduced emissions. From a maintenance perspective, the 4.7-liter oil capacity (using H-D 360 20W50) is vital for thermal management in the rear cylinder, which lacks the direct airflow of the front unit.
Chassis & Suspension Dynamics
The Freewheeler utilizes 49mm dual bending valve front forks which provide linear damping characteristics. At the rear, the use of emulsion technology with a hand-adjustable preload knob allows riders to compensate for cargo weight without tools. The tire configuration is asymmetrical in purpose: the front MT130/60B19 provides motorcycle-like turn-in, while the automotive-style P205/65R15 rear tires provide a massive contact patch for stability and traction.
Maintenance Guide & Essential Specs
- Lubrication: Use 4.7 Liters of Harley-Davidson 360 20W50. Ensure the engine is at operating temperature before checking levels to avoid overfilling.
- Tire Maintenance: Pressure is critical for handling. Maintain 36 psi (2.48 bar) in the front and 26 psi (1.79 bar) in the rear. Lower rear pressures are essential for ride quality and to prevent the “hopping” sensation common in solid-axle trikes.
- Electrical: The 66000175 (65989-97E) battery is a high-CCA unit designed to crank the high-compression 114 engine. Periodic terminal cleaning is recommended to prevent voltage drops that can trigger RDRS fault codes.
- Ignition: Use H-D 6R10 spark plugs. Proper gapping is essential to maintain the knock-sensing capabilities of the ECM.
MotoSpecsLab Verdict
The FLRT/23 represents the pinnacle of factory trike engineering. By combining the raw power of the 114 cui engine with a stripped-down hot rod aesthetic, Harley-Davidson has created a machine that is as technically competent as it is visually striking. Strict adherence to the 26 psi rear tire specification and high-quality 20W50 synthetic oil is the key to longevity for this platform.