Positioned in Buell's naked motorcycle lineup, the 2004 Buell Lightning XB12S relies on a 1203 cc (73.4 cu in) air-cooled twin, four-stroke powerplant. In factory specification, peak output is rated at 100 HP (73 kW) at 6,600 rpm while maximum torque reaches 109.7 Nm (80.9 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and belt final drive. With a specific output of 83.1 HP per liter and a 600 rpm working window between peak torque (6,000 rpm) and peak power (6,600 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 XB12S measures 179 kg (395 lbs) dry, translating to a power-to-weight ratio of 0.56 HP/kg (1.79 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 5 indexed model years from 2004 to 2008, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
83.1 HP/L
Power-to-Weight
0.56 HP/kg (1.79 kg/HP)
Power Band Window
6,000–6,600 rpm
Standover Height
765 mm (30.1 in)
Engine
Displacement1203.0 ccm (73.41 cubic inches)
Engine TypeTwin, four-stroke
Power100.0 HP (73.0 kW)) @ 6600 RPM
Torque109.7 Nm (11.2 kgf-m or 80.9 ft.lbs) @ 6000 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 Weight179.0 kg (394.6 pounds)
Power/Weight0.5587 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, Racing Red/Graphite-Grey/Translucent Amber
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.
