| Specification | Data |
|---|---|
| Model Year | 2014 |
| Engine Type | Twin Cam 103™ (Air-cooled) |
| Engine Oil | SAE 20W-50 (2.8 L) |
| Front Tire | 100/90B19 57H |
| Rear Tire | 160/70B17 73V |
| Battery Model | 65989-97E |
| Spark Plug | HD 6R12 |
The 2014 Harley-Davidson Dyna Super Glide Custom (FXDC) holds a prestigious place in Milwaukee history as the final production year for this specific model designation, marking the end of a lineage that defined the ‘factory custom’ movement since 1971. Engineering-wise, the 2014 iteration was distinguished by the standardization of the Twin Cam 103™ powertrain, offering a significant torque increase over its predecessors while retaining the raw, rubber-mounted engine vibration that Dyna enthusiasts demand.
Engineering Analysis: The Dyna Chassis and Twin Cam 103
The FXDC/14 utilizes the classic Dyna frame, characterized by its dual external rear coil-over shocks. This architecture provides a more traditional aesthetic and accessible suspension tuning compared to the Softail’s hidden linkage. The heart of the machine is the 1690cc (103 ci) V-Twin, which utilizes Electronic Sequential Port Fuel Injection (ESPFI) to deliver a peak torque of 130 Nm at 3,000 RPM. This specific year benefited from refined ABS integration and a robust 6-speed Cruise Drive® transmission.
Maintenance Protocols for Peak Performance
As the Editor-in-Chief of MotoSpecsLab, I emphasize that the longevity of the Twin Cam 103 is predicated on strict adherence to lubrication and electrical maintenance schedules.
Lubrication System
For the primary and crankcase, SAE 20W-50 is the standard requirement. The system capacity is 2.8 Liters. We recommend synthetic blends for riders in high-ambient temperature climates to prevent thermal breakdown of the oil during low-speed cruising.
Tires and Contact Patch Management
The FXDC/14 relies on a staggered wheel setup that requires precise pressure management for cornering stability:
- Front (100/90B19 57H): Maintain at 2.1 bar (30 psi).
- Rear (160/70B17 73V): Maintain at 2.5 bar (36 psi) for solo operation. If carrying a passenger or full luggage, increase to 2.8 bar (40 psi) to prevent sidewall deformation.
Electrical and Ignition
The 2014 model uses the high-output 65989-97E battery. Given the high compression of the 103 engine, ensuring a clean CCA (Cold Cranking Amps) delivery is vital. For ignition, the HD 6R12 spark plugs should be gapped according to factory service manuals and inspected every 5,000 miles for carbon fouling or electrode erosion.
MotoSpecsLab Professional Verdict
The FXDC/14 represents the pinnacle of the ‘Super Glide’ evolution. It offers a purist riding experience with modern reliability. For the collector or the daily rider, maintaining the specific tire pressures and oil volumes listed above is non-negotiable for preserving the handling characteristics of the Dyna’s rubber-mounted geometry.