| General |
| Year | 2009 | 2025 |
| Make Model | Buell 1125R | Harley Davidson Sportster S |
| Dimensions |
| Seat Height | 775 mm / 30.5" | 765 mm / 30.1 in |
| Wheelbase | 1384 mm / 54.5" | 1520 mm / 59.8 in |
| Ground Clearance | 114 mm / 4.5" | 90 mm / 3.5 in |
| Height | - | 1085 mm / 42.7 in |
| Length | 1996 mm / 78.6" | 2270 mm / 89.42 in |
| Seat Height (Laden) | - | 734 mm / 28.9 in |
| Width | 716 mm / 28.2" | 840 mm / 33.1 in |
| Weights & Capacities |
| Dry Weight (kg) | 170 | 221 |
| Wet Weight (kg) | - | 228 |
| Dry Weight | 170 kg / 375 lbs | 221 kg / 487 lbs |
| Fuel Capacity | 21.2 L / 5.6 US gal | 11.7 Litres / 3.1 US gal |
| Wet Weight | - | 228 kg / 502 lbs |
| Performance |
| Top Speed | 243 km/h / 151 mph | - |
| Max Power | 109 kW / 146 hp @ 9800 rpm | 121 hp / 90 kW @ 7500 rpm |
| Max Torque | 111 Nm / 11.3 kgf-m / 81.9 ft.lbs@ 9000 rpm | 126 Nm / 93 lb-ft @ 6000 rpm |
| Standing Start ¼ Mile | 11.0 sec | - |
| Engine |
| Displacement | 1125 cc / 68.7 cu in | 1252 cc / 76.4 cu-in |
| Engine Detail | Four stroke, 72° V-Twin | Four stroke, 60° V-twin Revolution Max 1250, Chain-driven, DOHC, hydraulic self-adjusting lifters, intake & exhaust VVT, four valves per cylinder |
| Bore x Stroke | 103 x 67.5 mm | 105 x 72.3 mm |
| Compression Ratio | 12.3:1 | 12.0:1 |
| Cooling System | Liquid cooled | Liquid cooled |
| Exhaust | - | 2-into-1-into-2, catalyst in muffler |
| Fuel Induction | Dual Ø61 mm downdraft throttle Bbodies, DDFI III Fuel Injection System | Electronic Sequential Port Fuel Injection (ESPFI) |
| Lubrication | - | Semi-dry sump |
| Starter | Electric | Electric |
| Drivetrain |
| Clutch | - | Mechanical, 8 plate wet, assist & slip, 1090N |
| Final Drive | Belt | Belt, 34/80 ratio |
| Gear Ratios | 1st 2.462 / 2nd 1.750 / 3rd / 1.381 / 4th 1.174 / 5th 1.042 / 6th 1.00 | 1st 12.21 / 2nd 9.022 / 3rd 6.994 / 4th 5.641 / 5th 4.731 / 6th 4.131 |
| Primary Drive | - | Gear, 49/89 ratio |
| Transmission / Drive | 6 Speed | 6 Speed |
| Chassis |
| Frame Type | Aluminium frame with fuel in frame. | Stressed-member, high strength low alloy steel trellis frame; stamped, cast, and forged junctions; MIG welded; aluminum forged mid-structure |
| Suspension - Front | ø47 mm Showa inverted forks, adjustable compression damping. rebound damping and spring preload. | 43 mm inverted fork with compression, rebound and spring preload adjustability. Aluminium fork triple clamps |
| Suspension - Rear | 127 mm / 5.0" | Showa® coil over monoshock, adjustable compression damping. rebound damping and spring preload. | Linkage-mounted, piggyback monoshock with compression, rebound and hydraulic spring preload adjustability |
| Fork Angle | - | 28° |
| Lean Angle | - | 35° |
| Rake | 21° | 30° |
| Swingarm | - | High strength low alloy steel, tubular sections, stamped x-member, forged axle junctions; MIG welded |
| Trail | 83.8 mm / 3.3" | 148 mm / 5.8 in |
| Wheel Travel - Front | 120 mm / 4.7" | 92 mm / 3.6 in |
| Wheel Travel - Rear | - | 82 mm / 3.2 in |
| Wheels & Brakes |
| Brakes - Front | ZTL type brake, 6-piston, fixed caliper, Ø375 mm single-sided, inside out, stainless steel, floating rotor | Single 320mm rotor, radially mounted, monoblock, 4-piston caliper |
| Brakes - Rear | Single Ø240 mm disc, 2 piston floating caliper | Single 260mm solid uniform expansion rotor, floating single piston caliper |
| ABS | - | Standard |
| Rims - Front | - | 4.5 x 17 |
| Rims - Rear | - | 5.0 x 16 |
| Tyres - Front | 120/70 ZR17, Pirelli Diablo Corsa III | 160/70TR17 73V Dunlop- Harley-Davidson Series, radial, GT503 |
| Tyres - Rear | 180/55 ZR17, Pirelli Diablo Corsa III | 180/70R16 77V Dunlop- Harley-Davidson Series, radial, GT503 |
| Wheels | 6-Spoke ZTL2 cast aluminium | Aluminum cast, satin black |
| Wheels - Front | 3.50 x 17" | - |
| Wheels - Rear | 5.50 x 17" | - |