Yamaha SRV 250S (1995-96) vs Yamaha TZR 250R (1991) vs Yamaha XJ 400S Diversion (1991-) vs Yamaha XJ 650 Turbo (1985-86) vs Yamaha FZR 400RR (1991-95)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | SRV 250S | TZR 250R | XJ 400S Diversion | XJ 650 Turbo | FZR 400RR |
| Years: | 1995-96 | 1991 | 1991- | 1985-86 | 1991-95 |
| Engine: | Four stroke, V twin, SOHC | Two stroke, 90° V-Twin cylinder, read valve induction | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke transverse four cylinder. turbocharged. DOHC, 2 valves per cylinder, | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 248 cc / 15.0 cu-in | 249.7 cc / 15.2 cu-in | 399 cc / 24.2 cu-in | 653 cc / 39.8 cu-in | 399 cc / 24.3 cu-in |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air-cooled | Liquid cooled |
| Bore x Stroke: | 49 x 66 mm | 56 x 50.7 mm | 55 х 47 mm | 63 х 52.4 mm | 56 x 40.5 mm |
| Compression Ratio: | 9.8 : 1 | 7.5:1 | 10.7:1 | 8.2:1 | 12.2:1 |
| Induction: | 2x Mikuni BDS26 carburetors | 2x Mikuni flatside carburetor | 4x 30mm CV | 4x 30mm pressurized Mikuni CVs carburetors | Carburetor |
| Ignition: | T.C.I | Microcomputer controlled | CDI | CDI | Analogue CDI (Capacitive Discharge Ign.) |
| Max Power: | 27 hp @ 8500 rpm | 45 hp / 33.6 kW @ 9500 rpm | 42 ps / 30.8 kW @ 10000 rpm | 90 hp / 67.1 kW @ 9000 rpm　 | 66 hp / 48.6 kW @ 12500 rpm |
| Max Torque: | 2.5 kgf-m @ 8500 rpm | 3.8 kgf-m / 40 Nm @ 8000 rpm | 3.5 kgf-m / 25.3 lb-ft @ 7000 rpm | 8.33 kgf-m @ 7000 rpm | 4.0 kgf-m @ 9500 rpm |
| Transmission: | 5 Speed | 6 Speed | 6 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Shaft | Chain |
| Front Suspension: | Telescopic forks | 39mm Upside-down forks | Telescopic forks | 36mm Showa 140mm wheel travel, adjustments for air pressure | 41mm Telescopic forks |
| Rear Suspension: | Dual shocks | Monocross linkage | Dual shocks preload adjustable. | Dual Showa dampers, 79mm wheel travel, adjustments for air pressure, rebound damping | Monoshock single shock preload adjustable. |
| Front Brakes: | Single disc | 2X disc 4 piston calipers | Single discs 2 piston caliper | 2x 266mm discs | 2x 298mm discs 2 piston calipers |
| Rear Brakes: | Drum | Single disc 2 piston caliper | Single discs 2 piston caliper | Single 200mm drum | Single 210mm disc 2 piston caliper- |
| Front Tyre: | 90/90-18 | 110/70 Z17 | 110/70-17 | 3.25-19 | 120/60 VR17 |
| Rear Tyre: | 110/90-18 | 150/60 Z17 | 130/70-18 | 120/90 V18 | 160/60 VR17 |
| Dry Weight: | 143.8 kg / 316.5 lbs | 126 kg / 277.8 lbs | 178 kg / 392 lbs | 235 kg / 518 lbs | 160 kg / 352 lbs |
| Fuel Capacity: | NA | 15 Litres / 4.0 US gal | 18 Litres / 4.7 US gal | 19.5 Litres / 5.0 US gal | 15 Litres / 3.9 gal |