KTM 690 Duke (2008) vs Suzuki GS 500F (2004) vs Ducati Supersport S (2019-20) vs Ducati 400SS Junior (Half Fairing) (1991-98) vs Ducati 48 Piuma / 48 Export / 48 Sport / 50 Puima / 50 Sport (1961-68)

Comparison technical specifications

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Make:	KTM	Suzuki	Ducati	Ducati	Ducati
Model:	690 Duke	GS 500F	Supersport S	400SS Junior (Half Fairing)	48 Piuma / 48 Export / 48 Sport / 50 Puima / 50 Sport
Years:	2008	2004	2019-20	1991-98	1961-68
Engine:	Four stroke, single cylinder, SOHC, 4 valves	Four stroke, parallel twin cylinder	Testastretta 11°, L-Twin cylinder, 4 valve per cylinder, Desmodromic	Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valve per cylinder.	Two stroke, single cylinder, piston-port
Capacity:	653.7 cc / 39.91 cu in	487 cc / 29.7 cu in	937 cc / 57.2 cu in	398 cc / 24.3 cu in	47.6 cc / 2.9 cu in
Bore x Stroke:	102 x 80 mm	74 x 56.6 mm	94 x 67.5 mm	70.5 x 51 mm	38 x 42 mm
Cooling System:	Liquid Cooled	Air cooled	Liquid cooled	Air cooled	Air cooled
Compression Ratio:	11.8:1	9.0:1	12.6:1	10.0:1	6.3:1 (Export: 9.5:1)
Induction:	Generation Keihin EMS with EPT (Electric Power Throttle)	2 x 33mm Mikuni BST carburetors	Electronic fuel injection system, 53 mm throttle bodies with full Ride-by-Wire	Mikuni B79 carburetor	Dell'Orto T4 12D1 Sport / Export: Dell'Orto UA 15S
Starting:	Electric	Electric	Electric	Electric	Kick
Max Power:	46 kW / 65 hp @ 7500 rpm	35.1 kW / 45.5 hp @ 9200 rpm	82 kW / 110 hp @ 9000 rpm	30.9 kW / 42 hp @ 10000 rpm	1.1 kW / 1.5 hp @ 5200 rpm Sport / Export: 3.1kW / 4.2hp @ 8600 rpm
Transmission:	6 Speed	6 Speed	6-Speed	6 Speed	Three speed
Final Drive:	Chain X-Ring 5/8 x 5/16"	Chain	Chain; front sprocket 15; rear sprocket 43	Chain	Chain
Front Suspension:	WP Upside-down forks, 4860 ROMA	Telescopic forks, 7-way preload adjustment	Fully adjustable 48 mm usd Öhlins fork	Marzocchi inverted telescopic fork, 40USD/E	Telescopic fork
Rear Suspension:	WP monoshock, 4618 with Pro-lever deflector	Rising rate single shock, 7-way preload adjustment	Progressive linkage with adjustable Öhlins monoshock. Aluminium single-sided swingarm	Cantilever swingarm, Marzocchi PBS1R monoshock, preload and rebound damping	Swingarm, twin shocks
Front Brakes:	Single 320 mm floating disc, radially screwed four-piston brake caliper	Single 310mm disc, 4 piston caliper	2 x 320 mm Semi-floating discs, radially mounted Monobloc Brembo M4-32 callipers, 4-piston, radial pump with Bosch ABS	Single 320 mm disc	Drum, 90 mm (Export 105 mm)
Rear Brakes:	Single 240 mm floating disc, single piston caliper	Single 250mm disc, 2 piston caliper	245 mm disc, 2-piston caliper, Bosch ABS	Single 245 mm disc	Drum, 90 mm (Export 105 mm)
Seat Height:	865 mm / 34 in	790 mm / 31.1 in	810 mm / 31.9 in	750 mm / 29.5 in	760 mm / 29.9 in
Dry Weight:	148.5 kg / 327 in	173 kg / 381 lbs	183 kg / 403 lbs	173 kg / 381 lbs	Piuma: 47 kg / 104 lbs Sport: 49 kg / 108 lbs Export: 50 kg / 110 lbs