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) vs BMW F 750GS (2019)

Comparison technical specifications

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Make:	Harley-Davidson	Harley-Davidson	Aprilia	Aprilia	Aprilia	BMW
Model:	Harley Davidson XLH 1000 Sportster	Harley Davidson XLCH 1000 Sportster	AF1 125 Sport Pro	RS 250 Chesterfield Replica	RS 250	F 750GS
Years:	1983-85	1972	1992-93	1996	2000-01	2019
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	Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder
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	853 cc / 52 ci-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	84 x 77mm
Compression Ratio:	9.0:1	9.0:1	18:1	12.0:1 (+/- 0.7)	12.0:1 (+/- 0.7)	12.7:1
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	Electronic intake injection
Ignition:	Electronic	Electronic	Electronic	CDI	CDI	Knock control and oxygen sensors.
Starting:	Electric	Kick & Electric optional	Electric	Kick	Kick	Electric
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	77 hp / 57.4 kW @ 7500rpm
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	83 Nm / 61.2 lb-ft @ 6000rpm
Transmission:	4 Speed	4 Speed	6 Speed	6 Speed, direct drive	6 Speed, direct drive	Constant-Mesh 6 speed
Final Drive:	Chain	Chain	Chain	Chain, sealed, jointless, DID 520 V6	Chain, sealed, jointless, DID 520 V6	O-ring chain
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.	41mm telescopic forks
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.	Aluminum double-sided swing arm, directly mounted, preload and rebound damping adjustable (Dynamic ESA)
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	2 x 305mm discs, 2 piston calipers, ABS
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	Single 265mm disc,1 piston caliper, ABS
Front Tyre:	MJ 90-19	90/ 90-R19	100/80 -17	120/60-17	120/60-17	110/80-19
Rear Tyre:	MT 90-19	100 90-R18	140/70 -17	150/60-17	150/60-17	150/70-17