Of course. Here is the article about the 2007–2011 Harley-Davidson Dyna Twin Cam 96 (FXDB Street Bob).
2007–2011 Harley-Davidson Dyna Twin Cam 96 (FXDB Street Bob)
The 2007–2011 Harley-Davidson Dyna Twin Cam 96 (FXDB Street Bob) is a factory custom cruiser motorcycle that marked a significant evolution for Harley-Davidson’s Dyna platform. Introduced as a minimalist, post-war “bobber” style motorcycle, the Street Bob quickly became one of the most popular models in the Dyna family. This generation is defined by the introduction of the larger displacement Twin Cam 96 engine and the six-speed Cruise Drive transmission, offering riders a substantial upgrade in performance and highway cruising capability over its predecessors.
Development and Key Upgrades
The Street Bob model was first introduced for the 2006 model year, which was also the year Harley-Davidson debuted a completely redesigned Dyna chassis. However, the 2006 model still utilized the existing Twin Cam 88 engine (1,450 cc) mated to a five-speed transmission.
The most significant change arrived in 2007 with a sweeping powertrain upgrade across the Dyna line. The Twin Cam 88 was replaced by the new Twin Cam 96 engine. This update increased displacement from 88 to 96 cubic inches (1,584 cc), achieved by increasing the stroke. The new engine delivered a noticeable boost in torque, providing stronger acceleration and passing power. Paired with this new engine was the six-speed Cruise Drive transmission, a crucial upgrade that added an overdrive gear for more relaxed, lower-RPM highway cruising, reducing vibration and improving fuel economy at speed.
Design and Styling
The FXDB Street Bob’s aesthetic is central to its identity. It was designed from the factory to emulate the stripped-down “bobber” motorcycles that became popular after World War II. Key styling features that define this generation include:
Mini Ape-Hanger Handlebars: These internally-wired handlebars create a classic, aggressive riding posture.
Solo Seat: Emphasizing the minimalist, lone-rider look, the Street Bob came standard with a solo saddle.
Wrinkle-Black Finish: Many components, including the engine, console, and battery box cover, feature a textured wrinkle-black finish, contrasting with chrome elements.
Stripped Fenders: The bike features a “bobbed” or chopped rear fender and a clean front fender, exposing more of the tires.
Laced Wheels: Classic wire-spoked wheels, with a 19-inch front and 17-inch rear, were standard, reinforcing the traditional custom vibe.
* Tank-Mounted Console: A simple, gloss-black console integrates the speedometer and indicator lights, maintaining clean lines.
The Powertrain: Harley-Davidson Dyna Twin Cam 96
The heart of the 2007–2011 Street Bob is the air-cooled, 45-degree V-Twin Twin Cam 96 engine. This engine retained the classic Harley-Davidson architecture but featured significant internal upgrades over the Twin Cam 88. It was equipped with Electronic Sequential Port Fuel Injection (ESPFI) as standard, providing reliable starting, crisp throttle response, and automatic adjustment for altitude and temperature changes.
The engine’s rubber-mounting system is a hallmark of the Dyna chassis. Unlike the Softail family, where the engine is rigidly mounted, the Dyna’s powertrain is isolated from the frame by rubber mounts. This design allows the engine to vibrate at idle—giving it the characteristic Harley shake—but smooths out considerably once underway, resulting in a more comfortable ride over long distances compared to hard-mounted frames.
Chassis and Handling
The Dyna frame provides a solid foundation, balancing traditional cruiser styling with responsive handling. The Street Bob features conventional, non-adjustable 49mm front forks and dual coil-over shocks at the rear, with adjustable spring preload. Its mid-mounted foot controls and handlebar position place the rider in an upright, commanding posture. While a heavyweight cruiser, the Street Bob was known for being relatively nimble and capable in varied riding conditions, from city streets to winding back roads. Braking is handled by single-disc brakes on both the front and rear wheels.
Specifications: 2007-2011 Harley-Davidson FXDB Street Bob**
| General | |
| Brand | Harley-Davidson |
| Model | Dyna |
| Model Class | FXDB Street Bob |
| Model Year | 2007–2011 |
| Type | Cruiser / Bobber |
| Maximum mass (GVWR) | 1085 lb. (492 kg) |
| Maximum passengers | 1 (Stock), 2 (With optional passenger seat/pegs) |
| Performance | |
| Max. power | ~67 Hp (50 kW) @ Rear Wheel (Varies) |
| Max. torque | 92 ft-lb (125 N•m) / 3000 RPM |
| Top designed speed | ~110 mph (177 km/h) |
| Size | |
| Length | 92.8 in. (2357 mm) |
| Width | 37.5 in. (953 mm) |
| Height | 49.9 in. (1267 mm) |
| Wheelbase | 64.2 in. (1630 mm) |
| Seat height (laden) | 25.8 in. (655 mm) |
| Ground clearance | 4.92 in. (125 mm) |
| Curb weight (in running order) | 667 lb. (303 kg) |
| Engine | |
| Type | Air-cooled, Twin Cam 96, 45° V-Twin, Four Stroke |
| Displacement | 96 cu. in. (1584 cc) |
| Bore × Stroke | 3.75 in. × 4.38 in. (95.3 mm × 111.1 mm) |
| Compression ratio | 9.2:1 |
| Starting system | Electric starter |
| Fuel supplying system | Electronic Sequential Port Fuel Injection (ESPFI) |
| Lubricating system | Dry sump, pressurized |
| Oil capacity | 3.0 qt (2.8 L) |
| Engine oil type | SAE 20W-50 Harley-Davidson H-D 360 Motorcycle Oil |
| Idle speed | 1000 RPM ± 50 RPM |
| Transmission | |
| Transmission type | 6-speed Cruise Drive, manual |
| Clutch type | Wet, multi-disc, manual |
| Driving system | Belt drive |
| Primary reduction ratio | 1.353 |
| Final reduction ratio | 2.125 |
| Gear ratio | 1st: 3.337; 2nd: 2.313; 3rd: 1.719; 4th: 1.391; 5th: 1.175; 6th: 1.000 |
| Chassis | |
| Tire size | Front: 100/90-19 57H; Rear: 160/70-17 73V |
| Rim size | Front: 19 in. Laced Steel; Rear: 17 in. Laced Steel |
| Capacity of fuel tank | 4.8 gal (18.2 L) |
| Fuel consumption | Combined: ~43 mpg (5.5 L / 100 km) |
| Electric | |
| Battery | 12V / 19 Ah Sealed, maintenance-free |
| Headlight | 55W low beam, 60W high beam (Halogen) |
| Tail light | Incandescent Bulb |
| Shock Absorbers / Suspension | |
| Front travel | 5.0 in (127 mm) |
| Rear travel | 3.1 in (79 mm) |
| Front damping | Non-adjustable |
| Rear spring preload | Adjustable |
