Hyosung GV 125 Aquila (1998-06) vs Yamaha XT 660X (2010) vs Yamaha SRX 250 (1987-90) vs Harley-Davidson Harley Davidson XG 750 Street (2020) vs Harley-Davidson Harley Davidson FLSTF Fat Boy (2009)

Comparison technical specifications

Add bike	Remove bike	Remove bike	Remove bike	Remove bike	Remove bike
Make:	Hyosung	Yamaha	Yamaha	Harley-Davidson	Harley-Davidson
Model:	GV 125 Aquila	XT 660X	SRX 250	Harley Davidson XG 750 Street	Harley Davidson FLSTF Fat Boy
Years:	1998-06	2010	1987-90	2020	2009
Engine:	Four stroke, 75°V twin, DOHC, 4 valve per cylinder	Four stroke, single cylinder, SOHC, 4 valve	Four stroke, single cylinder, DOHC, 4 valves	Four stroke, Revolution X™ 60° V-Twin, SOHC, 4 valves per cylinder.	Four stroke, Twin Cam 96BTM Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder
Capacity:	124 cc / 7.6 cu-in	659 cc/ 40.2 cu-in	249 cc / 15.2 cu-in	749 cc / 46 cub in.	1584 cc / 96 cu-in
Bore x Stroke:	44.0 x 41.0 mm	100 x 84 mm	73 х 59.6 mm	85 x 66 mm	95.25 x 111.25 mm
Cooling System:	Air/oil cooled	Liquid cooled	Air cooled	Liquid cooled	Air cooled
Compression Ratio:	11.2:1	10: 1	10.0:1	11.0:1	9.2:1
Induction:	2x 26mm Mikuni BDS carburetor	Fuel injection, 44 mm throttle body	Y22PV Teikei carburetor	Mikuni Single Port Fuel Injection, 38 mm bore	Electronic Sequential Port Fuel Injection (ESPFI)
Ignition:	CDI	TCI	TCI	Electronic	Single-fire, non-wasted, map-controlled spark ignition
Starting:	Electric	Electric	Electric	Electric	Electric
Max Torque:	9.7 Nm / 7.2 lb-ft @ 10000 rpm	58.4 Nm / 5.7 kgf-m @ 5250 rpm	2.4 kgf-m / 17.3 lb-ft @ 8500 rpm	59 Nm / 6.0 kgf-m / 43.5 ft/lb @ 4000 rpm	124.7 Nm / 92 ft. lbs @ 3000 rpm
Transmission:	S peed	5 Speed	6 Speed	6 Speed	6 Speed
Final Drive:	Chain	Chain	Chain	Belt	Belt
Front Suspension:	Telescopic forks	43 mm Telescopic forks,	Centre axle 33mm forks	Non-adjustable 37mm forks	41.3 mm telescopic, chrome dust covers
Rear Suspension:	Swinging arm	Oscillating arm standard Monocross.	Single shock, adjustable spring preload	Spring-preload adjustable dual shocks	Hidden, horizontal-mounted, coil-over shock
Front Brakes:	Single 280mm disc	Single 320mm disc 4 piston caliper	Single disc 2 piston caliper	Single disc, 2 piston caliper	Single 292mm disc 4 piston caliper
Rear Brakes:	130mm Drum	Single 245mm disc 1 piston caliper	Drum	Single disc, 2 piston caliper	Single 292mm disc 4 piston caliper
Front Tyre:	110/90 -16	120/700-17	90/90-16	100/80 R17	140/75R17
Rear Tyre:	130/90 -15	160/60-17	100/90-18	140/75 R15	200/55R17
Seat Height:	665 mm / 26.2 in	875mm / 34.4 in	780 mm / 30.7 in	720 mm / 25.7 in	Laden 635 mm / 25.0 in Unladen 690 mm / 27.1 in
Fuel Capacity:	14 Litres / 3.7 US gal	15 Litres / 3.9 gal	9 Litres / 2.3 US gal	13.1 Litres / 3.5 US gal	18.9 Litres / 5.0 gal