Harley-Davidson Harley Davidson XLH 1000 Sportster (1983-85) vs Harley-Davidson Harley Davidson XLCH 1000 Sportster (1972) vs Aprilia AF1 125 Sport Pro (1992-93) vs Aprilia RS 250 Chesterfield Replica (1996) vs Aprilia RS 250 (2000-01)
Comparison technical specifications
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| Make: | Harley-Davidson | Harley-Davidson | Aprilia | Aprilia | Aprilia |
| Model: | Harley Davidson XLH 1000 Sportster | Harley Davidson XLCH 1000 Sportster | AF1 125 Sport Pro | RS 250 Chesterfield Replica | RS 250 |
| Years: | 1983-85 | 1972 | 1992-93 | 1996 | 2000-01 |
| Engine: | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. | Two stroke, single cylinder light alloy and barrel with GILNISIL surface coating | Two stroke, 90° V twin-cylinder, with laminar suction and exhaust valve. Separate lubrication with variable automatic mixer | Two stroke, 90° V twin-cylinder, with laminar suction and exhaust valve. Separate lubrication with variable automatic mixer |
| Capacity: | 997 cc / 60.8 cu-in | 997 cc / 60.8 cu-in | 124.7 cc / 7.6 cu in | 249 cc / 15.2 cu in | 249 cc / 15.2 cu in |
| Bore x Stroke: | 81.0 x 96.8 mm | 81 x 96.8 mm | 54 x 54.5 mm | 56 x 50.6 mm | 56 x 50.6 mm |
| Cooling System: | Air cooled | Air cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 9.0:1 | 9.0:1 | 18:1 | 12.0:1 (+/- 0.7) | 12.0:1 (+/- 0.7) |
| Induction: | Single 34mm Keihin carburetor | 38mm Keihin carburetor | Dell'Orto Ø 34 mm carburetor | 2 x Ø34 mm Mikuni 34 SS flat side carburetors | 2 x Ø34 mm Mikuni 34 SS flat side carburetors |
| Ignition: | Electronic | Electronic | Electronic | CDI | CDI |
| Starting: | Electric | Kick & Electric optional | Electric | Kick | Kick |
| Max Power: | 57 hp / 41.6 kW @ 5800 rpm | 57 hp / 41.6 kW @ 6200 rpm | 22.3 kW / 33 hp @ 11 000 rpm | 52.9 kW / 72.5 hp @ 11900 rpm | 52.9 kW / 72.5 hp @ 11900 rpm |
| Max Torque: | NA | 60 lb ft / 81 Nm @ 3500 rpm | 19.6 Nm / 2.0 kgf-m / 14.5 lb-ft @ 10000 rpm | 40 Nm / 4.08 kgf-m / 29.5 lb/ft @ 10750 rpm | 40 Nm / 4.08 kgf-m / 29.5 lb/ft @ 10750 rpm |
| Transmission: | 4 Speed | 4 Speed | 6 Speed | 6 Speed, direct drive | 6 Speed, direct drive |
| Final Drive: | Chain | Chain | Chain | Chain, sealed, jointless, DID 520 V6 | Chain, sealed, jointless, DID 520 V6 |
| Front Suspension: | 35mm Showa tubs diameter 193mm wheel travel. | Telescopic forks, 175mm wheel travel | Upside down fork, Ø 40 mm | Ø40 mm Inverted fork with adjustable rebound and compression damping. | Ø40 mm Inverted fork with adjustable rebound and compression damping. |
| Rear Suspension: | Dual Showa shocks spring preload adjustable, 76mm wheel travel. | Swing arm, 100mm wheel travel | Aprilia Progressive System with hydraulic single shock-absorber | Magnesium alloy swingarm. Monoshock with resevoir, adjustable extension, compression and spring preloading. | Magnesium alloy swingarm. Monoshock with resevoir, adjustable extension, compression and spring preloading. |
| Front Brakes: | Single 285mm disc | Drum, 292mm disc from optional | Single Ø 320 mm disc, 4 piston caliper | 2 x Ø298 mm discs, 4 piston calipers | 2 x Ø298 mm discs, 4 piston calipers |
| Rear Brakes: | Single 285mm disc | Drum | Single Ø 240 mm disc, 2 piston caliper | Single Ø220 mm disc, 2 piston caliper | Single Ø220 mm disc, 2 piston caliper |
| Front Tyre: | MJ 90-19 | 90/ 90-R19 | 100/80 -17 | 120/60-17 | 120/60-17 |
| Rear Tyre: | MT 90-19 | 100 90-R18 | 140/70 -17 | 150/60-17 | 150/60-17 |