2017 Harley-Davidson Dyna Fat Bob Technical Analysis & Specification Breakdown
Built around Harley-Davidson's custom - cruiser motorcycle platform, the 2017 Harley-Davidson Dyna Fat Bob relies on a 1690 cc (103.1 cu in) air-cooled v2, four-stroke powerplant. In factory specification, peak output is rated at 80 HP (58.4 kW) at 5,020 rpm while maximum torque reaches 130 Nm (95.9 lb-ft) at 3,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. With a specific output of 47.3 HP per liter and a 1,520 rpm working window between peak torque (3,500 rpm) and peak power (5,020 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Dyna Fat Bob measures 320 kg (705 lbs) wet (curb), translating to a power-to-weight ratio of 0.25 HP/kg (4 kg per horsepower). Rider ergonomics and chassis geometry center around a 705 mm (27.8 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,621 mm (63.8 in) wheelbase engineered for planted straight-line stability. The 18.93-liter (5 US gal) fuel tank paired with a rated consumption of 5.6 L/100 km provides an estimated theoretical range of roughly 338 km (210 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 5 indexed model years from 2013 to 2017, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
47.3 HP/L
Power-to-Weight
0.25 HP/kg (4 kg/HP)
Power Band Window
3,500–5,020 rpm
Theoretical Range
~338 km (210 mi)
Engine
Displacement1690.0 ccm (103.12 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsTwin Cam 103
Power80.0 HP (58.4 kW)) @ 5020 RPM
Torque130.0 Nm (13.3 kgf-m or 95.9 ft.lbs) @ 3500 RPM
Compression9.7:1
Bore x Stroke98.4 x 111.3 mm (3.9 x 4.4 inches)
Fuel SystemInjection. Electronic Sequential Port Fuel Injection (ESPFI)
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingAir
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
ClutchMulti-plate with diaphragm spring in oil bath
DrivelinePrimary chain, 34/46 ratio
Performance
Fuel Consumption5.60 litres/100 km (17.9 km/l or 42.00 mpg)
Greenhouse Gases129.9 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustChrome, “Tommy Gun” 2-1-2 collector exhaust with dual mufflers
Chassis
Rake29.0°
Trail125 mm (4.9 inches)
Front SuspensionTelescopic fork
Rear SuspensionTwin shocks
Wheelbase1621 mm (63.8 inches)
Ground Clearance125 mm (4.9 inches)
Wheels & Brakes
Front Tyre130/90-B16
Rear Tyre180/70-B16
Front BrakesDouble disc. 4-piston fixed. Optional ABS.
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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
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.
