| Specification | Value |
|---|---|
| Production Years | 1992, 2005–2014 |
| Engine Oil | HD 360 or SYN3 20W50 (2.8 L) |
| Front Tire | 100/90-19 57H |
| Rear Tire | 160/70B17 73V |
| Spark Plug | Harley-Davidson 6R12 |
| Battery | 65989-97C |
Engineering Highlight: The FXDC Dyna Super Glide Custom represents a pivotal moment in Harley-Davidson’s engineering history as the model that perfected the ‘Rubber-Mounted’ powertrain within the Dyna chassis. Unlike the Softail’s counterbalanced engines, the FXDC utilizes a vibration-isolation system that allows the engine to move independently of the frame, providing that iconic ‘Harley Quake’ at idle while smoothing out into a refined, high-torque cruiser at highway speeds.
Technical Review: The Custom Legacy
At MotoSpecsLab, we categorize the FXDC as the quintessential ‘Factory Custom.’ It bridged the gap between the minimalist FXD and the premium touring Dyna models. Its engineering core evolved from the Evolution engine in its 1992 debut to the Twin Cam 88, 96, and eventually the 103 cubic inch powerplants. The chassis is renowned for its handling characteristics, often considered the best-handling platform in the Big Twin lineup due to its dual rear shocks and stiff rectangular-section backbone.
Maintenance Guide & Fluid Specifications
To maintain the mechanical integrity of the Twin Cam engine, lubrication is paramount. The FXDC requires 2.8 liters of high-viscosity oil. We recommend Harley-Davidson 360 20W50 for standard climates or Screamin’ Eagle SYN3 20W50 for those seeking synthetic performance and better thermal stability in high-traffic environments.
Tires and Traction
The FXDC utilizes a staggered wheel setup that balances agility with high-speed stability. The 19-inch front wheel (100/90-19) provides sharp turn-in, while the 17-inch rear (160/70B17) handles the torque output of the V-Twin. Maintaining correct pressure is critical for preventing ‘cupping’ on the front tread: 2.1 bar (30 psi) is the standard for the front, while the rear requires 2.5 bar (36 psi) for solo riders, increasing to 2.8 bar (40 psi) when carrying a passenger or heavy luggage.
Electrical and Ignition
The ignition system relies on the Harley-Davidson 6R12 spark plugs. Given the lean-burn nature of modern V-Twins, inspecting plugs for carbon fouling every 5,000 miles is advised. The electrical system is anchored by the 65989-97C battery, a high-CCA (Cold Cranking Amps) unit necessary to turn over the high-compression cylinders.
Expert Verdict
The Dyna Super Glide Custom (FXDC) remains a favorite among purists for its balance of chrome aesthetics and raw mechanical feedback. By adhering to the 2.8L oil capacity and precise tire pressures, owners can ensure this machine maintains its legendary reliability and resale value.