Suzuki GP 125 (1978-83) vs Yamaha WR 426F (2001-02)
Comparison technical specifications
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| Make: | Suzuki | Yamaha |
| Model: | GP 125 | WR 426F |
| Years: | 1978-83 | 2001-02 |
| Engine: | Two stroke, single cylinder, rotary disc valve | Four stroke, single cylinder, DOHC, 5 valve |
| Capacity: | 123 cc / 7.5 cu in | 449 cc / 25.9 cu-in |
| Bore x Stroke: | 56 x 50 mm | 95 x 60.1 mm |
| Compression Ratio: | 6.8:1 | 12.5:1 |
| Cooling System: | Air cooled | Lliquid cooled |
| Induction: | Mikuni flatside carburetor | 39mm Keihin FCR39H carburetor |
| Starting: | Kick | Kick |
| Max Power: | 11.2 kW / 15 hp @ 8500 rpm | 58.1 hp / 42.4 kW @ 9000 rpm |
| Max Torque: | 12.7 Nm / 1.3 kgf-m / 9.4 lb-ft @ 7500 rpm | 49 Nm @ 7000 rpm |
| Transmission: | 5-Speed, constant mesh | 5 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Telescopic fork, oil dampened | 46mm Kayaba inverted telescopic forks compression and rebound damping adjustable |
| Rear Suspension: | Swingarm, twin shocks, coil springs | Fully adjustable Kayaba single shock, 315mm wheel travel, separate high and low speed compression adjustment. |
| Front Brakes: | Drum | Single 250mm disc |
| Rear Brakes: | Drum | Single 245mm disc |
| Front Tyre: | 2.75-18 | 80/100-21 |
| Rear Tyre: | 3.00-18 | 110/90-18 |
| Wheelbase: | 1235 mm / 48.6 in | 1490 mm / 58.7 in |
| Dry Weight: | 101 kg / 222 lbs | 114 kg / 251.3 lbs |