| Parameter | Specification |
|---|---|
| Production Years | 2018–2022 |
| Engine Type | Milwaukee-Eight 114 V-Twin |
| Oil Specification | SAE 20W50 (4.7 L) |
| Front Tire | 130/60B21 63H |
| Rear Tire | 240/40R18 79V |
| Tire Pressure (F/R) | 36 psi / 42 psi |
| Battery Model | 66000207A |
| Spark Plug | HD-10R12X |
Engineering Highlight: The Softail Evolution
A pivotal engineering achievement of the FXBRS (2018–2022) was the complete redesign of the Softail chassis. Unlike its predecessor, this generation utilized a high-stiffness carbon steel tubular frame that, combined with the aluminum swingarm, resulted in a 35-pound weight reduction while increasing chassis stiffness by 34%. This mechanical refinement allowed the massive 114 cubic inch Milwaukee-Eight engine to deliver its 119 ft-lb of torque with significantly less frame flex than previous iterations.
Technical Performance Analysis
The FXBRS is defined by its aggressive geometry. The 34-degree rake and the 21-inch front wheel create a long, low profile synonymous with American dragsters. However, the technical challenge for owners is managing the 240mm rear tire. While it provides a massive contact patch for straight-line acceleration, it requires precise tire pressure management to maintain predictable turn-in characteristics.
Maintenance Guide & Fluid Requirements
Engine Lubrication
The Milwaukee-Eight 114 is a precision-engineered powerplant that utilizes both oil and air cooling. For optimal thermal stability, SAE 20W50 is the required viscosity. A full oil service, including filter change, requires 4.7 Liters. At MotoSpecsLab, we recommend synthetic fluids for the FXBRS to better manage the heat generated by the rear cylinder in heavy traffic.
Chassis and Tires
The Breakout’s handling is highly sensitive to tire wear. The 130/60B21 front and 240/40R18 rear must be kept at 2.48 bar (36 psi) and 2.90 bar (42 psi) respectively. Under-inflation in the rear tire leads to “heavy” steering and accelerated cupping of the tread pattern.
Electrical & Ignition
The FXBRS utilizes a dual-spark plug configuration per cylinder to ensure complete combustion of the high-volume intake charge. Use only HD-10R12X plugs gapped to factory specifications. When replacing the battery, the 66000207A provides the necessary Cold Cranking Amps (CCA) to turn over the high-compression 114 CUI pistons.
Frequently Asked Questions
Q: How often should I change the oil on the FXBRS?
A: While the manual suggests longer intervals, technical best practice for the 114 engine is every 5,000 miles (8,000 km) to ensure the hydraulic lifters and tensioners remain debris-free.
Q: Why does the Breakout use different tire pressures than other Softails?
A: The 240mm rear tire has a unique profile that requires 42 psi to maintain its shape under the torque load of the 114 engine; lower pressures will degrade handling performance significantly.