Yamaha WR 450F (2003-04) vs Yamaha RD 350 (1975)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | WR 450F | RD 350 |
| Years: | 2003-04 | 1975 |
| Engine: | Four stroke, single cylinder, DOHC, 5 titanium valve per cylinder. | Two stroke, parallel twin cylinder, reed valves |
| Capacity: | 449 cc / 27.4 in | 347 cc / 21.1 cu-in |
| Bore x Stroke: | 95 x 63.4 mm | 64 х 54 mm |
| Cooling System: | Liquid cooled | Air cooled |
| Compression Ratio: | 12.5:1 | 6.6:1 |
| Lubrication: | Wet Sump | Autolube |
| Induction: | 39mm Keihin FCR flat-slide throttle position sensor | 2, Mikuni VM28 SC |
| Ignition: | Digital CDI | Battery, dual coils, breaker points |
| Starting: | Electric / Kick-starter | Kick |
| Max Power: | 58 hp / 42.3 kW @ 9000 rpm | 39 hp / 28.5 kW @ 7500 rpm |
| Max Torque: | 49 Nm / 33.1 lb-ft @ 7000 rpm | 24.1 lb-ft / 32.6 Nm @ 7000 rpm |
| Clutch: | Wet, multiple discs, cable operated | Wet, multi-plate |
| Transmission: | 5 Speed | 6 Speed |
| Final Drive: | "O" ring Chain | Chain |
| Frame: | Steel, Single cradle frame | Tubular, double cradle |
| Front Suspension: | 46mm Kayaba inverted telescopic fork, compression and rebound damping adjustable | Telescopic forks |
| Rear Suspension: | Fully adjustable Kayaba single shock, 315mm wheel travel, separate speed compression adjustment | Dual shocks |
| Front Brakes: | Single 250mm disc 4 piston caliper | Single 267mm disc 2 piston caliper |
| Rear Brakes: | Single 245mm disc 2-piston caliper | 178mm Drum |
| Front Tyre: | 80/100-21 | 3.00-18 |
| Rear Tyre: | 110/100-18 | 3.25-18 |
| Dimensions: | Length 2175 mm / 85.6 in Width 825 mm / 32.5 in Height 1300 mm / 51.2 in | Length 2057.4mm / 81.0 in |
| Wheelbase: | 1485 mm / 58.5 in | 1320.8 mm / 52.0 in |
| Ground Clearance: | 365 mm / 14.3 in | 162.5 mm / 6.4 in. |
| Seat Height: | 998 mm / 39.3 in | 800 mm / 31.5 in |
| Wet Weight: | 122 kg / 268 lbs | 155 kg / 342 lbs |
| Fuel Capacity: | 8 Liters / 2.1 US gal | 15.9 Litres / 4.2 gal |