Built around Buell's naked motorcycle platform, the 2004 Buell Lightning XB9S utilizes a 984 cc (60 cu in) air-cooled twin, four-stroke layout. In factory specification, peak output is rated at 84.2 HP (61.5 kW) at 7,400 rpm while maximum torque reaches 85.6 Nm (63.1 lb-ft) at 5,600 rpm, transferring power to the rear wheel through a 5-speed gearbox and belt final drive. With a specific output of 85.6 HP per liter and a 1,800 rpm working window between peak torque (5,600 rpm) and peak power (7,400 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the Lightning XB9S measures 175 kg (386 lbs) dry, translating to a power-to-weight ratio of 0.48 HP/kg (2.08 kg per horsepower). Rider ergonomics and chassis geometry center around a 765 mm (30.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,320 mm (52 in) wheelbase engineered for quick, flickable steering geometry. The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Buell archive, this model family spans 2 indexed model years from 2003 to 2004, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
85.6 HP/L
Power-to-Weight
0.48 HP/kg (2.08 kg/HP)
Power Band Window
5,600–7,400 rpm
Standover Height
765 mm (30.1 in)
Engine
Displacement984.0 ccm (60.04 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power84.2 HP (61.5 kW)) @ 7400 RPM
Torque85.6 Nm (8.7 kgf-m or 63.1 ft.lbs) @ 5600 RPM
Compression10.0:1
Bore x Stroke88.9 x 96.8 mm (3.5 x 3.8 inches)
Valves/Cylinder2
Fuel SystemInjection
Fuel ControlOverhead Valves (OHV)
CoolingAir
Transmission
Gearbox5-speed
Final DriveBelt (final drive)
Chassis
Frame TypeAluminium Frame with Uniplanar powertrain vibration isolation system
Rake21.0°
Trail83 mm (3.3 inches)
Front SuspensionShowa inverted fork with adjustable compression damping, rebound damping and spring preload
Front Travel120 mm (4.7 inches)
Rear SuspensionShowa shock absorber with adjustable compression damping, rebound damping and spring preload
Rear Travel127 mm (5.0 inches)
Wheelbase1320 mm (52.0 inches)
Ground Clearance127 mm (5.0 inches)
Wheels & Brakes
Front Tyre120/70-ZR17
Rear Tyre180/55-ZR17
Front BrakesSingle disc
Front Brake Ø375 mm (14.8 inches)
Rear BrakesSingle disc
Rear Brake Ø240 mm (9.4 inches)
Dimensions & Weight
Dry Weight175.0 kg (385.8 pounds)
Power/Weight0.4811 HP/kg
Seat Height765 mm (30.1 inches) If adjustable, lowest setting.
Overall Height1232 mm (48.5 inches)
Overall Length1924 mm (75.7 inches)
Overall Width831 mm (32.7 inches)
Fuel Capacity14.00 litres (3.70 US gallons)
Other
Color OptionsMidnight Black, Sunfire Yellow/Stardust Silver
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.
