KTM 990 Super Duke (2006) vs Suzuki Boulevard S40 (2017-18) vs Indian Chief Classic (2015-16) vs Yamaha TX 750 (1973) vs Triumph Bonneville T100 (2012) vs Suzuki GN 400E (1981-84)

Comparison technical specifications

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Make:	KTM	Suzuki	Indian	Yamaha	Triumph	Suzuki
Model:	990 Super Duke	Boulevard S40	Chief Classic	TX 750	Bonneville T100	GN 400E
Years:	2006	2017-18	2015-16	1973	2012	1981-84
Engine:	Four stroke, 75°V-twin cylinder, DOHC, 4 valves per cylinder	Four stroke, single cylinder, SOHC	Thunder Stroke™ 111	Four stroke, parallel twin cylinders, SOHC 2 valve per cylinder	Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder	Four stroke, single cylinder, SOHC, 4 valves
Capacity:	999.8 cc / 60.9 cu-in	652 cc / 39.8 cu-in	1811.cc / 105 cu-in	743 cc / 45.3 cu-in	865 cc / 52.8 cu in	396 cc / 24.2 cu in
Bore x Stroke:	101 x 62.4mm	94 x 94.0 mm	101 x 113 mm	80 x 74 mm	90 x 68 mm	88 х 65.2 mm
Compression Ratio:	11.5:1	8.5:1	9.5:1	8.8:1	9.2:1	9.3:1
Induction:	Electronic fuel injection / electric	Mikuni BS40	Electronic Fuel Injection System Closed loop fuel injection / 54mm bore	Carburetor	Fuel injection	36mm Mikuni
Starting:	Electric	Electric	Electric	Electric & Kick	Electric	Kick
Transmission:	6 Speed	5 Speed	6 Speed	5 Speed	5 Speed	5 Speed
Final Drive:	Chain, X-Ring 5/8 x 5/16"	Belt	Belt	Chain	Chain, X-ring	Chain
Front Suspension:	48mm WP Upside down adjustable	Telescopic 38 mm stanchions, coil spring, oil damped	Telescopic forks,	Telescopic forks	41mm Kayaba telescopic forks	Telescopic fork
Rear Suspension:	WP shock, fully adjustable	Twin shock, 5-way adjustable spring preload	Single shock,	Dual shock	Kayaba chrome spring twin shocks with adjustable preload	Dual shocks
Front Brakes:	2x 320mm discs 4 piston calipers	265 mm Single disc	2x 300 mm Floating Rotor 4 piston calipers	Single or dual 300mm disc 2 piston calipers (In Japan, the United States, and other markets the bike had a single disc, although the lugs needed to mount a second disc were in place. )	Single 310 mm disc, 2 piston calipers	Single disc
Rear Brakes:	Single 240mm disc 1 piston caliper	Drum, rod operated	Single 300 mm Floating Rotor 2 piston calipers	180mm Drum	Single 255 mm disc, 2 piston calipers	Drum
Front Tyre:	120/70 ZR17	100/90-19 57H, tube type	130/90B16 67H	3.50-19	100/90 19	3.60-18
Rear Tyre:	180/55 ZR17	140/80-15 67H, tube type	180/65B16 81H	4.00-18	130/80 17	4.60-16
Wheelbase:	1438 mm / 56.6 in	1480 mm / 58.3 in	1646 mm mm / 68.1 in	1455 mm / 57.3 in	1493 mm / 58.8 in	1410 mm / 55.5 in
Fuel Capacity:	18.5 Litres / 4.8 gal	10.5 Litres / 2.6 US gal	20.8 Litres / 5.5 Gal	14 Litres / 3.7 US gal	16.6 Litres / 4.4 US gal / 3.7 Imp gal	11.5 Litres / 3.0 US gal / 2.5 Imp gal