Suzuki GP 125 (1978-83) vs Yamaha WR 426F (2001-02) vs Suzuki GT 380M (1975)
Comparison technical specifications
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| Make: | Suzuki | Yamaha | Suzuki |
| Model: | GP 125 | WR 426F | GT 380M |
| Years: | 1978-83 | 2001-02 | 1975 |
| Engine: | Two stroke, single cylinder, rotary disc valve | Four stroke, single cylinder, DOHC, 5 valve | Two stroke, transverse three cylinder |
| Capacity: | 123 cc / 7.5 cu in | 449 cc / 25.9 cu-in | 371 cc / 22.6 cu in |
| Bore x Stroke: | 56 x 50 mm | 95 x 60.1 mm | 54 x 54 mm |
| Compression Ratio: | 6.8:1 | 12.5:1 | 7.2:1 |
| Cooling System: | Air cooled | Lliquid cooled | Air cooled |
| Induction: | Mikuni flatside carburetor | 39mm Keihin FCR39H carburetor | 3 x 24mm Mikuni carburetors |
| Starting: | Kick | Kick | Kick |
| Max Power: | 11.2 kW / 15 hp @ 8500 rpm | 58.1 hp / 42.4 kW @ 9000 rpm | 27.7 kW / 38 hp @ 7500 rpm |
| Max Torque: | 12.7 Nm / 1.3 kgf-m / 9.4 lb-ft @ 7500 rpm | 49 Nm @ 7000 rpm | 38 Nm / 3.9 kgf-m / 28 lb-ft @ 6000 rpm |
| Transmission: | 5-Speed, constant mesh | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain |
| Front Suspension: | Telescopic fork, oil dampened | 46mm Kayaba inverted telescopic forks compression and rebound damping adjustable | Telescopic fork, oil dampened |
| Rear Suspension: | Swingarm, twin shocks, coil springs | Fully adjustable Kayaba single shock, 315mm wheel travel, separate high and low speed compression adjustment. | Dual shocks, springs, 5-way adjustable |
| Front Brakes: | Drum | Single 250mm disc | Single 275 mm disc |
| Rear Brakes: | Drum | Single 245mm disc | 180mm drum |
| Front Tyre: | 2.75-18 | 80/100-21 | 3.00-19 4PR |
| Rear Tyre: | 3.00-18 | 110/90-18 | 3.50-18 4PR |
| Wheelbase: | 1235 mm / 48.6 in | 1490 mm / 58.7 in | 1379 mm / 54.3 in |