Yamaha SR 400SP (1979) vs Yamaha YZF 1000 R1M (2016) vs Yamaha FZ-6N (2004) vs Yamaha WR 250F (2003-04)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | SR 400SP | YZF 1000 R1M | FZ-6N | WR 250F |
| Years: | 1979 | 2016 | 2004 | 2003-04 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, single cylinder, DOHC, 5 valve |
| Capacity: | 399 cc / 24.3 cu-in | 998 cc / 60.9 cu-in | 599 cc / 36.5 cu-in | 249 cc / 15.2 cu-in |
| Bore x Stroke: | 87 х 67.2 mm | 79.0 x 50.9 mm | 65.5 x 44.5 mm | 77 x 53.6 mm |
| Compression Ratio: | 8.5:1 | 13.0:1 | 12.2:1 | 12.5:1 |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Liquid cooled, |
| Lubrication: | Dry sump | Wet sump | Wet sump | Dry sump |
| Induction: | BSR33 carburetor | Fuel Injection with YCC-T and YCC-I | Group injection type fuel injection, 36mm Funnel diameter | Keihin FCR-MX37 flat-slide w/throttle position sensor) |
| Ignition: | CDI | TCI: Transistor Controlled Ignition | TCI Digital CDI | Digital CDI |
| Starting: | Kick | Electric | Electric | Electric & Kick |
| Clutch: | Wet, Multiple Disc | Wet, Multiple Disc | Wet, multiple discs, cable operated | Wet, multiple discs, cable operated |
| Transmission: | 5 Speed | 6-speed w/multiplate slipper clutch | 6 Speed | 5 Speed |
| Final Drive: | Chain | "O" ring chain | Chain | Chain |
| Front Suspension: | 35mm Telescopic fork | 43mm KYB® inverted fork; fully adjustable | 43mm Telescopic fork, | 48mm Fully adjustable inverted forks |
| Front Wheel Travel: | 105 mm / 4.1 in | 120 mm / 4.7 in | 130 mm / 5.1 in | 300 mm / 11.8 in |
| Rear Suspension: | Dual shocks, 5-way adjustable preload | KYB® Single shock w/piggyback reservoir, 4-way adjustable | Swingarm Link less type Monocross | Fully adjustable link Monocross |
| Front Brakes: | Single disc | 2x 320mm discs 4 piston calipers, UBS ABS | 2x 298 mm discs | Single 250mm disc 2 piston caliper |
| Rear Brakes: | Drum | Single 220mm disc 1 piston caliper, UBS ABS | Single 245 mm disc | Single 240mm disc 1 piston caliper |
| Front Tyre: | 3.50-19 | 120/70 ZR17 | 120/70 ZR17 | 80/100-21 |
| Rear Tyre: | 4.00-16 | 190/55 ZR17 | 180/55 ZR17 | 100/100-18 |
| Wheelbase: | 1410 mm / 55.5 IN | 1419 mm / 55.9 in | 1440 mm / 56.6 in | 1475 mm / 58.1 in |
| Seat Height: | 790 mm / 30.9 in | 830 mm / 32.7 in | 795 mm / 31.2 in | 998 mm / 39.3 in |
| Ground Clearance: | 130 mm / 5.1 in | 135mm / 5.3 in | 145 mm / 5.7 in | 335 mm / 13.2 in |
| Fuel Capacity: | 12 Litres / 3.2 gal | 17 Liters / 4.5 US gal | 19 Litres / 5.0 US gal | 8 Liters / 2.1 US gal |