1999–2005 Harley-Davidson Dyna Twin Cam 88 (FXD Super Glide)

The 1999–2005 Harley-Davidson Dyna Twin Cam 88 (FXD Super Glide) represents a pivotal era for the American motorcycle manufacturer, marking the introduction of the highly anticipated Twin Cam engine to the agile Dyna platform. Serving as the entry point into Harley-Davidson’s “Big Twin” lineup, the FXD Super Glide combined the raw, stripped-down styling of its predecessors with a significant leap forward in performance and engineering. This generation laid the groundwork for the modern Dyna family, establishing a reputation for being a versatile and rider-focused cruiser that balanced classic aesthetics with contemporary power.

The most significant change from the previous generation of Dyna models was the retirement of the venerable 1340cc (82 cu in) Evolution engine in favor of the new 1450cc (88 cu in) Twin Cam 88. The Evolution engine, which had powered Harley’s Big Twins since 1984, was a beloved single-cam design known for its reliability and classic character. However, the Twin Cam 88 was engineered from the ground up to deliver more power, higher torque, and improved thermal efficiency to meet modern performance expectations and emissions standards.

This new engine featured two chain-driven camshafts (hence the “Twin Cam” name), which allowed for a more efficient valvetrain and better engine breathing. The result was a noticeable increase in horsepower and torque directly from the factory, providing stronger acceleration and better highway performance. While the rubber-mounted frame concept of the Dyna chassis was carried over to isolate engine vibrations, the character and power delivery of the Twin Cam 88 gave the 1999–2005 Super Glide a distinctly different feel from its Evolution-powered predecessor.

Features of the Harley-Davidson Dyna Twin Cam 88 Super Glide (FXD)

The FXD Super Glide was positioned as the no-frills, standard model within the Dyna family. Its design philosophy centered on providing the essential Harley-Davidson experience without excessive ornamentation, making it a popular choice for riders who valued performance and personalization.

Engine and Drivetrain

At the heart of the motorcycle was the air-cooled, 45-degree V-twin Twin Cam 88 engine. This first-generation “A” motor was not counter-balanced, relying entirely on the Dyna’s rubber-mounting system to isolate vibrations from the rider, a hallmark of the Dyna series. Early models (1999–2000) were known to have specific main bearing issues that were later rectified. A notable point of discussion for this engine generation is the spring-loaded cam chain tensioners, which became a known wear item requiring inspection and eventual replacement. Initially fed by a carburetor, Harley-Davidson began offering Electronic Fuel Injection (EFI) as an option in later years of this production run, providing improved throttle response and easier cold starts. Power was delivered through a five-speed transmission and a clean, quiet belt final drive.

Chassis and Styling

The Dyna frame is characterized by its traditional design, featuring twin external shock absorbers at the rear, which distinguishes it visually and functionally from the hidden-suspension Softail models. The FXD Super Glide maintained a classic cruiser stance with mid-mount foot controls and pullback handlebars that provided a comfortable, upright riding position.

Styling was intentionally minimalist. It featured a classic “eyebrow” headlight housing, a tank-mounted speedometer, and a solo-style seat (though often equipped with a passenger pillion). The Super Glide typically came with cast-aluminum wheels, with laced (spoke) wheels available as an option or on other Dyna variants. This straightforward design made it an ideal platform for customization, allowing owners to easily modify it into a bobber, chopper, or light-duty tourer.

Model Reception and Legacy

Upon its release, the FXD Super Glide with the Twin Cam 88 was well-received for its improved performance over the outgoing Evolution models. It offered a significant boost in power while retaining the nimble handling characteristics the Dyna chassis was known for. It became a workhorse of the Harley-Davidson lineup, appealing to both new and experienced riders. This generation solidified the Dyna’s identity as the “performance cruiser” in the company’s catalog, a bridge between the sportiness of the Sportster and the long-haul comfort of the Touring models.