Yamaha RD 200 (1976) vs Yamaha WR 250F (2015-16) vs Yamaha RD 250 (1976) vs Yamaha WR450F (2015-16)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | RD 200 | WR 250F | RD 250 | WR450F |
| Years: | 1976 | 2015-16 | 1976 | 2015-16 |
| Engine: | Two stroke, torque induction, parallel twin | Four stroke, single cylinder, DOHC, 4 valve | Two stroke, torque induction, parallel twin | Four stroke, Single cylinder, DOHC, 5 valves |
| Capacity: | 195 cc / 11.8 cu-in | 249 cc / 15.2 cu-in | 247 cc / 15.0 cu-in | 449 cc / 27.4 cu in |
| Bore x Stroke: | 52 х 46 mm | 77 x 53.6 mm | 54 х 54 mm | 95 x 63.4 mm |
| Cooling System: | Air cooled | Liquid cooled, | Air cooled | Liquid cooled |
| Compression Ratio: | 7.1:1 | 13.5:1 | 6.7:1 | 12.3:1 |
| Lubrication: | Autolube | Dry sump | Autolube | Dry sump |
| Induction: | 2x Y20P Carburetors | Yamaha Fuel Injection (YFI) Keihin 44mm | 2x Mikuni VM28 SC carburetor | 39mm Keihin FCR flat-slide throttle position sensor |
| Ignition: | Battery coil | TCI: Transistor Controlled Ignition | Battery and coil with breaker points | CDI |
| Starting: | Electric & Kick | Electric / Kick | Kick | Electric & kick |
| Clutch: | Wet multi-plate | Wet, multiple discs, cable operated | Wet multi-plate | Wet, multi-disc |
| Transmission: | 5 Speed | 5 Speed | 6 Speed | 5-Speed, constant mesh |
| Final Drive: | Chain | #520 Chain | Chain | Chain |
| Front Suspension: | Telescopic forks | KYB Speed-Sensitive System | Telescopic forks | 48mm Upside down telescopic fork |
| Rear Suspension: | Dual shocks | KYB Fully adjustable single shock | Dual shocks | Swingarm, link suspension, mono shock |
| Front Brakes: | Single 245 mm disc | Single 250mm disc 2 piston caliper | Single disc | Hydraulic single 250 mm disc 4 piston caliper |
| Rear Brakes: | Drum | Single 245mm disc 1 piston caliper | Drum | Single 245 mm disc 2 piston caliper |
| Front Tyre: | 2.75-18-4PR | 80/100-21 | 3.00S-18-4PR | 80/100-21 51P |
| Rear Tyre: | 3.25-18-4PR | 100/100-18 | 3.50S-18-4PR | 120/90-18 65P |
| Dimensions: | Length 1945 mm / 76.5 in Width 755 mm / 29.7 in Height 980 mm / 38.5 in | Height 1280 mm / 50.4 in Width 965 mm / 38.0 in Length 2164 mm / 85.2 in | Length 2030 mm / 79.9 in Width 830 mm / 32.6 in Height 1085 mm / 42.7 in | Length: 2315 mm / 91.1 in Width: 825 mm / 32.5 in Height: 1275 mm / 50.2 in |
| Wheelbase: | 1240 mm / 48.8 in | 1,466 mm / 57.7 in | 1325 mm / 52.1 in | 1475 mm / 58.1 in |
| Ground Clearance: | 155 mm / 6.1 in | 325 mm / 12.8 in | 150 mm / 5.9 in | 335 mm / 13.2 in |
| Fuel Capacity: | 11.5 Litres / 3.0 US gal | 7.5 Liters / 2.0 gal | 16.5 Liters / 4.2 US gal | 7.2 Litres / 1.9 US gal |