Yamaha SR 400SP (1979) vs Yamaha FJR 1300AE (2006) vs Yamaha TZR 250RS-SP (1994) vs Yamaha FZ-6N (2004) vs Yamaha WR 250F (2003-04)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | SR 400SP | FJR 1300AE | TZR 250RS-SP | FZ-6N | WR 250F |
| Years: | 1979 | 2006 | 1994 | 2004 | 2003-04 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Two stroke, 90° V-Twin cylinder, read valve induction | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, single cylinder, DOHC, 5 valve |
| Capacity: | 399 cc / 24.3 cu-in | 1298 cc / 79.2 cu-in | 249.7 cc / 15.2 cu-in | 599 cc / 36.5 cu-in | 249 cc / 15.2 cu-in |
| Bore x Stroke: | 87 х 67.2 mm | 79 x 66.2 mm | 56 x 50.7 mm | 65.5 x 44.5 mm | 77 x 53.6 mm |
| Compression Ratio: | 8.5:1 | 10.8:1 | 7.5:1 | 12.2:1 | 12.5:1 |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled, |
| Induction: | BSR33 carburetor | Electronic Fuel Injection | 2x Mikuni flatside carburetor | Group injection type fuel injection, 36mm Funnel diameter | Keihin FCR-MX37 flat-slide w/throttle position sensor) |
| Ignition: | CDI | TCI (Transistor Controlled Ignition) | Microcomputer controlled | TCI Digital CDI | Digital CDI |
| Starting: | Kick | Electric | Kick | Electric | Electric & Kick |
| Transmission: | 5 Speed | 5 Speed Yamaha Chip-Controlled Shift (YCC-S) | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Shaft | Chain | Chain | Chain |
| Front Suspension: | 35mm Telescopic fork | 48mm upside-down telescopic fork w/adjustable preload, compression and rebound damping; | 39mm Upside-down forks | 43mm Telescopic fork, | 48mm Fully adjustable inverted forks |
| Rear Suspension: | Dual shocks, 5-way adjustable preload | Single shock, link-type, w/adjustable preload and rebound damping | Monocross linkage | Swingarm Link less type Monocross | Fully adjustable link Monocross |
| Front Brakes: | Single disc | 2x 320mm discs 4 piston calipers | 2X disc 4 piston calipers | 2x 298 mm discs | Single 250mm disc 2 piston caliper |
| Rear Brakes: | Drum | Single 283mm disc 2 piston caliper | Single disc 2 piston caliper | Single 245 mm disc | Single 240mm disc 1 piston caliper |
| Front Tyre: | 3.50-19 | 120/70 ZR17 | 110/70 Z17 | 120/70 ZR17 | 80/100-21 |
| Rear Tyre: | 4.00-16 | 180/55 ZR17 | 150/60 Z17 | 180/55 ZR17 | 100/100-18 |
| Wheelbase: | 1410 mm / 55.5 IN | 1544.3 mm / 60.8 in | 1340 mm / 52.8 in | 1440 mm / 56.6 in | 1475 mm / 58.1 in |
| Seat Height: | 790 mm / 30.9 in | 805 mm - 825.5 mm / 31.7 in - 32.5 in. | 780 mm / 30.7 in | 795 mm / 31.2 in | 998 mm / 39.3 in |
| Fuel Capacity: | 12 Litres / 3.2 gal | 25 Liters / 6.6 gal | 15 Litres / 4.0 gal | 19 Litres / 5.0 US gal | 8 Liters / 2.1 US gal |