2006–2006 Harley-Davidson Dyna Twin Cam 88 (FXDC Super Glide Custom 6-Speed)

The 2006 Harley-Davidson Dyna Twin Cam 88 (FXDC Super Glide Custom 6-Speed) is a cruiser motorcycle that marked a significant evolution for Harley-Davidson’s popular Dyna platform. Introduced as part of a comprehensively redesigned Dyna family for the 2006 model year, the FXDC blended classic Super Glide styling with an increased level of factory-custom finish and substantial mechanical upgrades. This model year is particularly notable for introducing a new chassis and, most importantly, the six-speed Cruise Drive transmission, enhancing the motorcycle’s performance and touring capability.

A New Generation for the Dyna Platform

The 2006 model year represented a major overhaul for the entire Dyna lineup, moving it a considerable step forward from its predecessors. The most significant departure from the previous models was the introduction of an all-new, more robust frame. This redesigned chassis provided increased stiffness, which translated directly to improved handling and stability, particularly at higher speeds and during aggressive cornering.

Complementing the new frame were thicker 49mm front forks, replacing the 39mm units used on earlier Dyna models. This change provided a more substantial front end, reducing flex and contributing to a more planted and confident feel for the rider. However, the most celebrated upgrade was the new six-speed Cruise Drive transmission, which replaced the long-serving five-speed gearbox. This addition provided smoother shifting and, crucially, lowered engine RPM at highway speeds, reducing vibration and improving fuel economy for long-distance riding.

Technical Profile of the 2006 Harley-Davidson Dyna Twin Cam 88 (FXDC Super Glide Custom 6-Speed)

At the heart of the FXDC is the rubber-mounted Twin Cam 88 engine. Displacing 88 cubic inches (1450cc), the air-cooled, 45-degree V-Twin was a proven powerhouse known for its significant low-end torque. For 2006, the engine was equipped with standard Electronic Sequential Port Fuel Injection (ESPFI), offering improved throttle response, easier starting, and better performance across various altitudes and temperatures compared to the carbureted versions of the past.

The pairing of this engine with the new six-speed Cruise Drive transmission defined the riding experience. The transmission was engineered for durability and smooth operation, with a final drive gear ratio that made highway cruising more relaxed and enjoyable. This combination allowed riders to fully utilize the Twin Cam 88’s torque band while benefiting from a more capable and modern drivetrain.

Styling and Ergonomics

The “Custom” designation of the FXDC set it apart from the standard Super Glide (FXD) with a host of aesthetic upgrades. The model featured a generous application of chrome, covering the engine cases, battery box cover, and other key components. It came equipped with a low-slung, two-up seat designed for both solo riding comfort and passenger capability.

Ergonomics were defined by pullback handlebars mounted on a custom riser, creating a relaxed riding position. The forward-mounted foot controls further enhanced this laid-back cruiser feel. Visually, the FXDC Super Glide Custom was distinguished by its silver powder-coated engine with chrome covers, a color-matched electrical panel cover, and classic chrome laced steel wheels, which underscored its custom-inspired DNA. The large, tank-mounted speedometer and distinctive “fat bob” fuel tank were signature elements that completed its powerful stance.

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2006 FXDC Super Glide Custom Specifications