Yamaha TT-R 250 (2001-) vs Yamaha TDR 125R (2001-02) vs Yamaha FZR 400 Genesis (1987) vs Yamaha FJ 1200 1UX (1987-88)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | TT-R 250 | TDR 125R | FZR 400 Genesis | FJ 1200 1UX |
| Years: | 2001- | 2001-02 | 1987 | 1987-88 |
| Engine: | Four stroke, single cylinder, DOHC, 4-valve per cylinder. | Two stroke, single cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 249 cc / 15.1 cu-in | 124 cc / 7.6 cu-in | 399 cc / 24.3 cu-in | 1188 cc / 72.5 cu in |
| Cooling System: | Air-cooled | Liquid cooled | Liquid cooled | Air/oil cooled, |
| Bore x Stroke: | 73 x 59.6 mm | 56 x 50.7 mm | 54 x 43.6 mm | 77 x 63.8 mm |
| Compression Ratio: | 10.3:1 | 6.8:1 | 11.5:1 | 9.7:1 |
| Induction: | TEIKEI Y30P carb | 28mm Dell'Orto carburetor | Carburetor | 4x 36mm Mikuni carbs |
| Ignition: | Digital CDI | Electronic | Analogue CDI (Capacitive Discharge Ign.) | TCI (Transistor Controlled Ignition) |
| Starting: | Electric | Electric | Electric | Starting |
| Max Power: | 28 hp / 20.6 kW @ 8500 rpm | 15 hp / 10.9 kW @ 9500 rpm | 50 hp @ 11500 rpm ) | 130 hp / 94.9 kW @ 9000 rpm |
| Max Torque: | 2.8 kgf-m / 27.1 Nm / 20.0 lb-ft @ 7000 rpm | 2.1 kgf-m / 15.1 lb-ft @ 9500 rpm | 3.7 kgf-m @ 10000 rpm | 108 Nm / 79.6 lb-ft @ 7500 rpm |
| Transmission: | 6 Speed | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Chain 2.353 (40/17) |
| Front Suspension: | Telescopic forks, Coil air spring oil damper | 41mm Telescopic forks | Uprighting telescopic | Telescopic with 3-way preload and damping adjustment |
| Rear Suspension: | Monocross, Single shock, link-type, w/adjustable preload | Monoshock adjustable preload | Aluminium swing arm | Monocross monoshock 5-way preload and 5-way damping adjustment |
| Front Brakes: | Single 245mm disc | Single 320mm disc 2 piston caliper | 2x discs 2 piston caliper | 2x 282mm discs 2 piston caliper |
| Rear Brakes: | Single 220mm disc | Single 210mm disc 1 piston caliper | Single disc2 piston caliper | Single 282mm disc 2 piston caliper |
| Front Tyre: | 3.00-21 | 100/80-17 | 110/70 R-17 | 120/80 V16 |
| Rear Tyre: | 4.60-18 | 130/70-17 | 140/60 R-18 | 150/80 V16 |
| Seat height: | 914 mm / 36.0 in | 850 mm / 33.4 in | 785mm / 30.9 in | 780 mm / 30.7 in |
| Dry Weight: | 113 kg / 249 lbs | 136 kg / 300 lbs | 157 kg / 346 lbs | 245 kg / 540.1 lbs |
| Fuel Capacity: | 10.2 Litres / 2.7 US gal | 11 Litres / 2.9 US gal | 18 Litres / 4.75 gal | 22 Litres / 5.8 gal |