2005 Yamaha YZ 125 specifications
Available technical data for this model and year. Specifications can vary by market and version.
Technical specifications
| Displacement | 124.0 ccm (7.57 cubic inches) |
|---|---|
| Engine type | Single cylinder, two-stroke |
| Compression | 8.7:1 |
| Bore x stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Valves per cylinder | 1 |
| Fuel system | Carburettor |
| Cooling system | Liquid |
| Gearbox | 5-speed |
| Transmission type | Chain (final drive) |
| Front suspension | 48mm Kayaba inverted cartridge fork w/adjustable compression and rebound damping |
| Rear suspension | Kayaba single shock w/adjustable preload, compression and rebound damping and separate hi/lo-speed compression adjusters |
| Front brakes | Single disc |
| Rear brakes | Single disc |
| Front tyre | 80/80-21 |
| Rear tyre | 100/90-19 |
| Seat height | 993 mm (39.1 inches) If adjustable, lowest setting. |
| Overall height | 1318 mm (51.9 inches) |
| Overall length | 2134 mm (84.0 inches) |
| Overall width | 828 mm (32.6 inches) |
| Wheelbase | 1486 mm (58.5 inches) |
| Fuel capacity | 7.94 litres (2.10 US gallons) |
Source: Bikez: YZ 125, 2005. Retrieved 2026-09-19. Match confidence: exact.
Years listed are the entries held in this archive, rather than a complete production history.
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