Yamaha YZF 600R Thundercat (1999) vs Ducati 900 SS (1981) vs Yamaha GTS1000 / ABS (1997-99) vs Kawasaki VN 900 Vulcan Custom (2009-10) vs Yamaha GX 400 (1977) vs Kawasaki KH 125 (1977) vs Yamaha FJR 1300A (2007)
Comparison technical specifications
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| Make: | Yamaha | Ducati | Yamaha | Kawasaki | Yamaha | Kawasaki | Yamaha |
| Model: | YZF 600R Thundercat | 900 SS | GTS1000 / ABS | VN 900 Vulcan Custom | GX 400 | KH 125 | FJR 1300A |
| Years: | 1999 | 1981 | 1997-99 | 2009-10 | 1977 | 1977 | 2007 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, 90°“L”twin cylinder, SOHC, 2 valves per cylinder, bevel gear driven | Four stroke, transverse four cylinder, DOHC, 5 valves per cylinder. | Four stroke, V-twin, SOHC, 4 valves per cylinder | Four stroke, parallel twin | Two stroke, single cylinder, | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 599 cc / 36.5 cu-in | 864 cc / 52.7 cu in | 1002 cc / 61.2 cu-in | 903 cc / 49 cu-in | 391 | 124 cc / 7.6 cu-in | 1298 cc / 79.2 cu-in |
| Bore x Stroke: | 62 x 49.6 mm | 86 x 74.4 mm | 75.5 X 56 mm | 88.0 x 74.2 mm | 69 х 52.4 mm | 56 x 50.6 mm | 79 x 66.2 mm |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled | Liquid cooled | Air cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 12.0:1 | 9.4:1 | 10.8:1 | 9.5:1 | 9.2:1 | 7.0:1 | 10.8:1 |
| Induction: | 4 x 36 mm Keihin CV downdraft carburetors | 2 x Dell'Orto PHF 32C carburetors | Electronic fuel infection. | 2x 34mm ø Fuel injection with dual throttles | Carburetor | Carburetor | Electronic Fuel Injection |
| Starting: | Electric | Electric | Electric | Electric | Kick | Kick | Electric |
| Max Power: | 72.9 kW / 100 hp @ 11500 rpm | 47.8 kW / 65 hp @ 7500 rpm | 102 hp / 74.4 kW @ 9000 rpm | 37 kW / 50 hp @ 5700 rpm | 37 hp @ 8800 rpm | 145 hp / 105.7 kW @ 8500 rpm | |
| Front Suspension: | 41 mm telescopic fork adjustable preload, compression and rebound damping | Marzocchi telescopic fork | Single sided swingarm variable preload, compression and rebound damping | 41mm telescopic fork with 7-way preload | Telescopic forks | 48mm upside-down telescopic fork w/adjustable preload, compression and rebound damping | |
| Rear Suspension: | Monoshock adjustable preload, bump and rebound | Marzocchi dual shocks, 3-way adjustable | Monocross variable preload, compression and rebound damping | Uni-Trak with 7-way adjustable preload | Dual shocks | Single shock, link-type, w/adjustable preload and rebound damping | |
| Front Brakes: | 2x 300 mm Discs, 4 piston calipers | 2 x 280 mm Disc, 1 piston caliper | Single 330mm disc 6 piston caliper with ABS | Single 300mm disc | Single disc | Single disc | 2x 320mm discs 4 piston calipers |
| Rear Brakes: | Single 245mm disc, 2 piston caliper | Single 280 mm disc | Single 282mm disc 2 piston caliper | Single 270mm disc | Single disc | Drum | Single 283mm disc 2 piston caliper |
| Fuel Capacity: | 19 Litres / 5.0 US gal / 4.2 Imp gal | 15 L / 4.0 US gal / 3.3 Imp gal | 20 Litres / 5.28 gal | 20 Litres / 5.3 US gal | 11.6 Litres | 25 Liters / 6.6 gal |