2009 Harley-Davidson FXDB Dyna Street Bob Technical Analysis & Specification Breakdown
Engineered by Harley-Davidson for the custom - cruiser motorcycle segment, the 2009 Harley-Davidson FXDB Dyna Street Bob features a 1584 cc (96.7 cu in) air-cooled v2, four-stroke configuration. In factory specification, maximum torque reaches 123 Nm (90.7 lb-ft) at 3,125 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. Internal engine geometry specifies a bore and stroke of 95.3 x 111.1 mm (3.8 x 4.4 inches) with a 9.2:1 compression ratio.
On the scales, the FXDB Dyna Street Bob measures 205 kg (452 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 655 mm (25.8 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops. The 18.2-liter (4.8 US gal) fuel tank paired with a rated consumption of 5.5 L/100 km provides an estimated theoretical range of roughly 331 km (206 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 3 indexed model years from 2007 to 2009, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~331 km (206 mi)
Engine
Displacement1584.0 ccm (96.66 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsV2, four-stroke
Torque123.0 Nm (12.5 kgf-m or 90.7 ft.lbs) @ 3125 RPM
Compression9.2:1
Bore x Stroke95.3 x 111.1 mm (3.8 x 4.4 inches)
Fuel SystemInjection. Electronic Sequential Port Fuel Injection (ESPFI)
CoolingAir
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
Clutch9-plate, wet
Performance
Fuel Consumption5.50 litres/100 km (18.2 km/l or 42.77 mpg)
Greenhouse Gases127.6 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustChrome, staggered shorty exhaust with dual mufflers
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
