| General |
| Year | 2008 | 2024 |
| Make Model | Buell XB12S Lightning | Triumph Speed 400 |
| Dimensions |
| Seat Height | 765 mm / 30.1" | 790 mm / 31.1 in |
| Wheelbase | 1320 mm / 52.0" | 1377 mm / 54.2 in |
| Ground Clearance | 110 mm / 4.4" | - |
| Height | 1092 mm / 43.0" | 1075 mm / 42.3 in |
| Length | 1924 mm / 75.7" | 2056 mm / 80.9 in |
| Width | 768 mm / 30.2" | 795 mm / 31.3 in |
| Weights & Capacities |
| Wet Weight (kg) | - | 170 |
| Dry Weight (kg) | 179 | - |
| Dry Weight | 179 kg / 395 lbs | - |
| Fuel Capacity | 14 L / 3.7 US gal | 13 Litres / 3.43 US gal |
| Maximum Load / GVWR | 386 kg / 850 lbs | - |
| Oil Capacity | 2.37 L / 2.50 qts | - |
| Wet Weight | - | 170 kg / 375 lbs |
| Performance |
| Top Speed | 216.2 km/h / 134 mph | - |
| Max Power | 86.9 kW / 103 hp @ 6800 rpm | 29.4 kW / 40hp @ 8000 rpm |
| Max Torque | 114 Nm / 11.6 kgf-m / 84 ft-lbs @ 6000 rpm | 38 Nm / 28 ft-lbs @ 6500 rpm |
| Standing Start ¼ Mile | 12.2 sec | - |
| Engine |
| Displacement | 1203 cc / 73 cu in | 398 cc / 24.3 cu-in |
| Engine Detail | 45° V-Twin, four stroke, pushrod actuated overhead valve. hydraulic self-adjusting lifters, 2 valve per cylinder. | Four stroke, DOHC, single cylinder, 4 valves |
| Bore x Stroke | 88.9 x 96.8 mm | 89.0 x 64.0mm |
| Compression Ratio | 10.0:1 | 12.1:1 |
| Cooling System | Air cooled | Liquid cooled |
| Emissions | - | Euro 5 |
| Exhaust | Free breathing, 2-into-1 Tuned, tri-pass resonance chamber with InterActive valve and mass-centralized mounting | - |
| Fuel Induction | Ø49 mm downdraft DDFI II fuel injection | Bosch ride-by-wire EFI |
| Fuel Reserve | 2.8 L / 0.75 US gal | - |
| Lubrication | Dry sump | - |
| Starter | Electric | Electric |
| Drivetrain |
| Clutch | Wet, multi-plate | Wet multiplate with assist and slip functions |
| Final Drive | Belt | X-ring chain |
| Gear Ratios | 1st 2.649 / 2nd 1.892 / 3rd 1.407 / 4th 1.166 / 5th 1.000 | - |
| Transmission / Drive | 5 Speed | 6-Speed |
| Chassis |
| Frame Type | Aluminium frame with Uniplanar Powertrain vibration isolation system, fuel in frame | Hybrid spine/perimeter, tubular steel, bolt-on rear subframe |
| Suspension - Front | Showa ø43 mm inverted forks compression damping, rebound damping and spring preload adjustable | 43mm Showa Big Piston, non-adjustable inverted fork |
| Suspension - Rear | Showa coil-over monoshock, remote underseat reservoir and adjustable compression damping, rebound damping and spring preload, 127mm wheel travel | Single shock, fixed damping with the shock adjustable piggy-back reservior |
| Rake | 21° | 26.6° |
| Swingarm | - | Twin-sided, cast aluminium alloy |
| Trail | 83 mm / 3.3" | 101.6 mm / 4 in |
| Wheel Travel - Front | 120 mm / 4.7" | 139.7 mm / 5.5 in |
| Wheel Travel - Rear | 127 mm / 5.0" | 129.4 mm / 5.1 in |
| Electrical Systems |
| Instrumentation | - | Analogue speedometer with integrated multi-function LCD screen |
| Wheels & Brakes |
| Brakes - Front | ZTL type brake, 6 piston, fixed caliper, Ø375 mm single-sided, inside out, stainless steel, floating rotor | Single 300 mm disc with radially mounted 4-piston caliper |
| Brakes - Rear | Single Ø240 mm disc, 1 piston floating caliper | Single 230 mm disc with floating caliper |
| ABS | - | Bosch dual channel |
| Tyres - Front | 120/70 ZR17 Pirelli | 110/70 x R17 |
| Tyres - Rear | 180/55 ZR17 Pirelli | 150/60 x R17 |
| Wheels | 6-Spoke, ZTL cast aluminium | - |
| Wheels - Front | 3.50 x 17" | 17 x 3 in with 10-spoke cast aluminium alloy rims |
| Wheels - Rear | 5.50 x 17" | 17 x 4 in with 10-spoke cast aluminium alloy rims |