The Yamaha YZ 125 motorcycle specifications include a 124 cc (7.57 cu in) engine and a listed weight of 87.5 kg (192.9 lb).
Key specifications
The 2002 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Yamaha YZ 125 compares
This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.
About 77% lower than the Yamaha database average. Around the 18th percentile across Yamaha models.
About 25% taller than the Yamaha database average. Around the 99th percentile across Yamaha models.
Yamaha database percentile rankings
Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.
124 cc — larger displacement than about 18% of Yamaha models.
994 mm — taller than about 99% of Yamaha models.
Dimensions compared with Yamaha average
Each measurement is compared with the average value across Yamaha models where that dimension is available.
2,130
2,082
Close to average.
827
823
Close to average.
1,311
1,172
12% above average.
1,444
1,416
Close to average.
994
793
25% above average.
Mechanical overview
Additional useful specifications
| Front tire size | 80/100-21 51M |
|---|---|
| Rear tire size | 100/90-19 57M |
| Front tire width | 80 mm |
| Front tire aspect ratio | 100% |
| Front rim diameter | 21 in |
| Rear tire width | 100 mm |
| Rear tire aspect ratio | 90% |
| Rear rim diameter | 19 in |
| Bore/stroke ratio | 0.99:1 (Square) |
Model information
| Category | Cross / motocross |
|---|
Engine specifications
| Engine type | Single cylinder, two-stroke |
|---|---|
| Displacement | 124 cc (7.57 cu in) |
| Bore × stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Compression ratio | 8.7:1 |
| Cooling system | Liquid |
Chassis and suspension
| Front wheel travel | 300 mm (11.8 inches) |
|---|---|
| Rear wheel travel | 315 mm (12.4 inches) |
Brakes, wheels and tires
| Front brakes | Single disc |
|---|---|
| Rear brakes | Single disc |
| Front tire | 80/100-21 51M |
| Rear tire | 100/90-19 57M |
Dimensions and weight
| Dry weight | 87.5 kg (192.9 lb) |
|---|---|
| Seat height | 994 mm (39.1 inches) |
| Overall length | 2,130 mm (83.9 inches) |
| Overall width | 827 mm (32.6 inches) |
| Overall height | 1,311 mm (51.6 inches) |
| Wheelbase | 1,444 mm (56.9 inches) |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.