Yamaha TT 600 (1988-90) vs Yamaha FZR 400R-SP (1989) vs Yamaha SR 500 (1988-92) vs Moto Guzzi NTX 350 (1987-) vs Kawasaki KLX 125 (2014-) vs Yamaha GX 250 (1978-79)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Moto Guzzi | Kawasaki | Yamaha |
| Model: | TT 600 | FZR 400R-SP | SR 500 | NTX 350 | KLX 125 | GX 250 |
| Years: | 1988-90 | 1989 | 1988-92 | 1987- | 2014- | 1978-79 |
| Engine: | Four stroke, single cylinder, SOHC, 4 Valve | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, 90° V twin, longitudinally mounted, OHV, 2 valve per cylinder. | Four stroke, single cylinder, SOHC, 2 valve | Four stroke parallel twin-cylinder OHC 2 valve per cylinder |
| Capacity: | 595 cc / 36.5 cu-in | 399 cc / 24.3 cu-in | 499 cc / 30.4 cu-in | 346.2 cc / 21.1 cu-in | 124 cc / 7.6 cu-in | 248 |
| Bore x Stroke: | 95 x 84 mm | 56 x 40.5 mm | 87 х 84 mm | 66 x 50.6 mm | 54.0 x 54.4 mm | 55 х 52.4 mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air cooled | Air cooled | Air-cooled |
| Compression Ratio: | 8.5:1 | 12.2:1 | 9.0:1 | 10.5:1 | 9.5:1 | 9.6:1 |
| Induction: | 27mm Dual stage Teikei Y27PVX1 carburetor | Carburetor | 34mm Mikuni VM34SS carburetor | 2x Dell'Orto PHBH 28 carburetors | Fuel injection: ø20 mm x 1 Keihin | Carburetor |
| Max Power: | 45 hp / 34 kW @ 6500 rpm | 60 hp / 440 kW @ 12500 rpm | 31.5 hp / 23.5 kW @ 6500 rpm | 35 hp / 26 kW @ 8100 rpm | 10.3 hp / 7.6 kW @ 8000 rpm | 25 hp @ 9500 rpm |
| Max Torque: | 50 Nm / 4.7 kgf-m @ 5500 rpm | 4.0 kgf-m @ 9500 rpm | 36.3 Nm / 26.8 lb-ft @ 5500 rpm | 27.3 Nm / 20.2 lb-ft @ 6500 rpm | 10.0 Nm / 7.3 lb-ft @ 6400 rpm | 1.9 k-m @ 8500 rpm |
| Transmission: | 5 Speed | 6 Speed | 5 Speed | 5 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Chain | Chain | Chain |
| Front Suspension: | 43mm Telescopic forks | 41mm Telescopic forks | 35mm telescopic forks | Hydraulic telescopic forks | 33 mm telescopic fork | Telescopic forks |
| Rear Suspension: | Alloy swinging arm single shock with adjustable dampers. | Monoshock single shock preload adjustable. | Dual shock, 5-way adjustable spring preload. | Twin shocks | New Uni-Trak | Dual shocks |
| Front Brakes: | Single 310mm disc | 2x 298mm discs 2 piston calipers | Single 200mm disc | Single 260mm disc 2 piston caliper | Single 240mm disc 2 piston caliper | Single disc |
| Rear Brakes: | Single 270mm disc | Single 210mm disc 2 piston caliper- | 150mm drum | Single 260mm disc 1 piston caliper | Single 190mm disc 1 piston caliper | Single disc |
| Front Tyre: | 3.00-21 | 110/70 VR17 | 3.50 S18 | 3.00_21 | 70/100-19 | 3.00-18 |
| Rear Tyre: | 4.60-18 | 140/60 VR18 | 4.00 S18 | 4.00 _18 | 90/100-16 | 3.25-18 |
| Dry Weight: | 138 kg / 304.2 lbs | 160 kg / 352 lbs | 158 kg / 348 lbs | 165 kg / 363.7 lbs | 112 kg / 247 lbs | 168 kg |
| Fuel Capacity: | 13 Litres / 3.4 US gal | 15 Litres / 3.9 gal | 12 Litres / 3.1 US gal | 32 Litres / 8.4 US gal | 7.0 Litres / 1.9 US gal |