| Component | Specification |
|---|---|
| Engine Oil | SAE 20W50 (Harley-Davidson H-D 360) / 2.8 Liters |
| Front Tire | 100/90B19 57H (2.1 bar / 30 psi) |
| Rear Tire | 160/70B17 73V (2.5 bar Solo / 2.8 bar Loaded) |
| Battery | 65989-97D |
| Spark Plugs | HD-6R12 (Gap: 0.97–1.09 mm) |
The Engineering Legacy of the FXDL/17
A unique engineering highlight of the 2014–2017 FXDL/17 is its “Perfect Fit” ergonomics. This was the first Dyna to feature a factory-adjustable seat and handlebar risers, allowing riders to customize the reach by up to 1.5 inches without replacing hardware. Historically, this model represents the final evolution of the rubber-mounted Dyna chassis before Harley-Davidson unified the Big Twin line under the Softail platform in 2018, making the FXDL/17 a highly sought-after piece of pure Dyna history.
Performance and Euro 4 Compliance
The FXDL/17 is powered by the High Output Twin Cam 103™ engine. To meet stringent Euro 4 emissions standards, this iteration features a closed-loop exhaust system with dual O2 sensors and a high-efficiency catalytic converter. The rubber-mounted powertrain isolates high-frequency vibrations from the rider while maintaining the characteristic “Harley pulse” at idle. The dual-disc front brakes—a rarity in the cruiser segment—provide the superior stopping power required for the increased torque of the 103 cubic inch powerplant.
Maintenance Guide
Lubrication System
For optimal thermal stability, MotoSpecsLab recommends SAE 20W50 (Harley-Davidson H-D 360). The system capacity is 2.8 liters. Given the Euro 4 heat profile, regular oil changes every 5,000 miles (8,000 km) are critical to prevent oil breakdown and protect the hydraulic lifters.
Tires and Chassis
The FXDL/17 utilizes a 19-inch front and 17-inch rear wheel configuration. Maintaining precise pressure is vital for the Dyna’s handling characteristics: 2.1 bar (30 psi) in the front and 2.5 bar (36 psi) in the rear. If touring with luggage or a passenger, the rear pressure must be increased to 2.8 bar (40 psi) to prevent sidewall overheating.
Electrical and Ignition
The electrical system relies on the 65989-97D battery. For ignition, use HD-6R12 spark plugs. The gap is precise: 0.97–1.09 mm. An incorrect gap on a Twin Cam engine can lead to ionization detection errors in the Delphi EFI system, potentially causing phantom knock readings and retarded timing.
Frequently Asked Questions (FAQ)
Q: What is the specific battery model for the FXDL/17?
A: The factory-recommended battery is the 65989-97D.
Q: Can I use synthetic oil?
A: Yes, Screamin’ Eagle Syn3 20W50 is a compatible synthetic alternative for the H-D 360 mineral oil.
Q: Why does the FXDL/17 have dual front discs?
A: The dual-disc setup was reintroduced to this model to handle the increased performance of the 103ci engine and to provide better heat dissipation during aggressive braking.