2006–2006 Harley-Davidson Dyna Twin Cam 88 (FXDB Street Bob)

Of course. Here is a full article about the 2006 Harley-Davidson Dyna Street Bob, written to your specifications.

*

The 2006–2006 Harley-Davidson Dyna Twin Cam 88 (FXDB Street Bob)** marked a significant year for the Motor Company, introducing a new factory custom model that captured the stripped-down, post-war “bobber” aesthetic. Released as part of a heavily updated Dyna platform, the Street Bob was an immediate success, blending minimalist styling with major mechanical upgrades. It was designed to appeal to riders seeking a raw, unadulterated motorcycle experience straight from the showroom floor, offering a blank canvas for customization while delivering a substantially improved ride over its predecessors.

The Street Bob was introduced as a new model for 2006, but the entire Dyna family received a ground-up redesign this year, representing the most significant changes since the platform’s debut. Compared to the previous 2005 Dyna models, the 2006 lineup featured a completely new, more rigid frame. The front suspension was upgraded from 39mm to robust 49mm forks, providing a more planted feel and improved handling. Perhaps the most celebrated upgrade was the introduction of the 6-speed “Cruise Drive” transmission, which replaced the outgoing 5-speed gearbox. This addition provided smoother shifting and lowered engine RPMs at highway speeds, enhancing rider comfort on long journeys. Furthermore, the 2006 Dynas were fitted with a wider 160mm rear tire, contributing to a more muscular stance and better grip.

Design and Styling

The FXDB Street Bob’s identity is rooted in its minimalist, “bobber” design language. Harley-Davidson’s styling department stripped the bike of any components deemed non-essential. Key features included a solo seat, a “chopped” rear fender without traditional supports, and distinctive mini ape-hanger handlebars that provided an aggressive yet comfortable riding position. The fuel tank was adorned with a simple, functional wrinkle-black console that housed the speedometer, moving it from the handlebars for a cleaner look.

Furthering its raw aesthetic, the Street Bob featured a blacked-out powertrain with polished fin edges, a black battery box, and a black belt guard. The wheels were traditional steel-laced (spoked) rims, adding to the classic, old-school vibe. The mid-mounted foot controls positioned the rider in a commanding, upright posture. This combination of features created a motorcycle that looked like a custom build, appealing to riders who valued individuality and heritage.

Powertrain and Performance of the 2006 Harley-Davidson Dyna Twin Cam 88

At the heart of the 2006 Street Bob is the rubber-mounted Twin Cam 88 engine. Displacing 88 cubic inches (1450cc), the air-cooled, 45-degree V-twin was a proven workhorse known for its ample low-end torque. For 2006, all Dyna models came standard with Electronic Sequential Port Fuel Injection (ESPFI), which offered improved throttle response, better fuel economy, and easier cold starts compared to the carbureted versions of previous years.

The engine was paired with the all-new 6-speed Cruise Drive transmission. This was a major engineering advancement for Harley-Davidson, designed to handle the engine’s torque while providing a smoother, quieter ride. The sixth gear acts as a true overdrive, significantly reducing vibration and engine labor during highway cruising. Power was delivered to the rear wheel via a clean, low-maintenance belt drive system.

Chassis and Handling

The 2006 Dyna platform was built on a stronger, stiffer tubular steel frame. This new chassis, combined with the stout 49mm front forks and a recalibrated rear suspension, delivered a significant improvement in handling and stability over the pre-2006 models. The chassis redesign aimed to reduce flex and provide a more responsive ride, whether navigating city streets or carving through winding roads.

Braking was handled by a single 300mm disc with a 4-piston caliper at the front and a single 292mm disc with a 2-piston caliper at the rear. While not a high-performance sport setup, the brakes were considered adequate for the bike’s weight and intended purpose. The combination of the new frame, upgraded suspension, and wider tires gave the 2006 Street Bob a confident and predictable feel that inspired riders of all skill levels.

Specifications