| MODEL | HARLEY-DAVIDSON SPORTSTER 1250S 2021 |
| Year | 2021 |
| Engine Type | Four stroke, 60° V-twin, DOHC, 4 valves per cylinder, VVT (Revolution Max 1250T) |
| Displacement / Capacity | 1252 cc / 76.4 cu in |
| Bore X Stroke | 105 x 72.3 mm |
| Compression Ratio | 12.0:1 |
| Cooling System | Liquid cooled |
| Max Power | 90 kW / 121 hp @ 7500 rpm |
| Max Torque | 127 Nm / 94 lb-ft @ 6000 rpm |
| Ignition | — |
| Induction | Electronic Sequential Port Fuel Injection (ESPFI) |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Semi-dry sump |
| Gear Box | 6 Speed |
| Clutch | Wet, multiplate (8 plates), assist and slip |
| Final Drive | Belt |
| CHASSIS SPECS | |
| Frame | High-strength low-alloy steel trellis with forged aluminium mid-structure, engine as stressed member |
| Front Suspension | 43 mm inverted fork, adjustable compression, rebound and preload, 92 mm / 3.6 in travel |
| Rear Suspension | Linkage-mounted piggyback monoshock, adjustable compression, rebound and hydraulic preload, 51 mm / 2.0 in travel |
| Front Brakes | Single 320 mm disc, radial-mount 4-piston monoblock caliper, ABS |
| Rear Brakes | Single 260 mm disc, single-piston floating caliper, ABS |
| DIMENSION SPECS | |
| Overall Length | 2265 mm / 89.2 in |
| Overall Width | 843 mm / 33.2 in |
| Overall Height | 1089 mm / 42.9 in |
| Seat Height | 734 mm / 28.9 in (laden); 753 mm / 29.6 in (unladen) |
| Wheelbase | 1518 mm / 59.8 in |
| Ground Clearance | 93 mm / 3.66 in |
| Dry Weight | 220 kg / 486 lb |
| Wet Weight | 228 kg / 502 lb |
| WHEEL SPECS | |
| Front Tyre | 160/70TR17 73V |
| Rear Tyre | 180/70R16 77V |
| FUEL SYSTEM | |
| Fuel Capacity | 11.8 Litres / 3.1 US gal |
| Fuel Consumption | 4.8 L/100 km / 49 mpg (US) |
| Top Speed | — |
The Sportster S launched for 2021 as a complete break from the air-cooled Evolution Sportsters, built around the liquid-cooled 121 hp Revolution Max 1250T V-twin used as a stressed member of the chassis. It mixes bobber, flat-track and sport-bike styling with a fat 17-inch front tyre, fully adjustable inverted fork and a radial-mount monoblock front brake. Short rear suspension travel was the most common criticism of the early bikes.
