The Yamaha YZ125 Monster Energy motorcycle specifications include a 125 cc (7.63 cu in) engine, a 6-speed gearbox, and a listed weight of 94.8 kg (209 lb).
Key specifications
The 2022 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Yamaha YZ125 Monster Energy 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 25th percentile across Yamaha models.
About 49% lighter than the Yamaha database average. Around the 9th percentile across Yamaha models.
About 24% taller than the Yamaha database average. Around the 98th percentile across Yamaha models.
About 48% smaller than the Yamaha database average. Around the 18th 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.
125 cc — larger displacement than about 25% of Yamaha models.
94.8 kg — heavier than about 9% of Yamaha models, or lighter than about 91%.
980 mm — taller than about 98% of Yamaha models.
6.8 L — larger than about 18% of Yamaha fuel tanks in this database.
Dimensions compared with Yamaha average
Each measurement is compared with the average value across Yamaha models where that dimension is available.
2,136
2,082
Close to average.
826
823
Close to average.
1,295
1,172
10% above average.
1,445
1,416
Close to average.
980
793
24% above average.
366
181
103% above average.
Mechanical overview
Additional useful specifications
| Front tire size | 80/100-21 |
|---|---|
| Rear tire size | 100/90-19 |
| 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 |
| Front tire pressure | 15 PSI (1 Bar or 100 kPa) |
| Rear tire pressure | 15 PSI (1 Bar or 100 kPa) |
| Engine oil capacity | 0.70 L (0.74 US qt) |
| Spark plug | NGK BR9EVX, NGK BR9EIX |
| Bore/stroke ratio | 0.99:1 (Square) |
Engine specifications
| Engine type | Single cylinder, two-stroke |
|---|---|
| Displacement | 125 cc (7.63 cu in) |
| Bore × stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Compression ratio | 10.7:1 |
| Cooling system | Liquid |
| Fuel system | Carburettor. Keihin PWK38S |
| Ignition | Digital CDI |
| Starter | Kick |
| Lubrication | Premix |
| Oil capacity | 0.70 L (0.74 US qt) |
| Spark plugs | NGK BR9EVX, NGK BR9EIX |
Transmission and drivetrain
| Gearbox | 6-speed |
|---|---|
| Final drive | Chain (final drive) |
| Clutch | Multiplate wet clutch |
Chassis and suspension
| Frame | Aluminum semi-double cradle |
|---|---|
| Front suspension | KYB® Speed-Sensitive System inverted fork; fully adjustable |
| Rear suspension | KYB® single shock; fully adjustable |
| Front wheel travel | 300 mm (11.8 inches) |
| Rear wheel travel | 315 mm (12.4 inches) |
| Rake | 26.0° |
| Trail | 109 mm (4.3 inches) |
| Fork tube size | 48 mm (1.9 inches) |
Brakes, wheels and tires
| Front brakes | Single disc. Hydraulic. |
|---|---|
| Rear brakes | Single disc. Hydraulic. |
| Front tire | 80/100-21 |
| Rear tire | 100/90-19 |
| Front tire pressure | 15 PSI (1 Bar or 100 kPa) |
| Rear tire pressure | 15 PSI (1 Bar or 100 kPa) |
| Wheels | Bridgestone® Battlecross tires |
Dimensions and weight
| Wet weight | 94.8 kg (209 lb) |
|---|---|
| Seat height | 980 mm (38.6 inches) |
| Overall length | 2,136 mm (84.1 inches) |
| Overall width | 826 mm (32.5 inches) |
| Overall height | 1,295 mm (51.0 inches) |
| Wheelbase | 1,445 mm (56.9 inches) |
| Ground clearance | 366 mm (14.4 inches) |
Fuel and emissions
| Fuel capacity | 6.81 L (1.80 US gal) |
|---|
Other specifications
| Color options | Team Yamaha Blue/green |
|---|---|
| Factory warranty | 30 Day Limited Factory Warranty |
| Brake fluid | DOT 4 |
| Price as new | US$ 7099. MSRP depends on country, taxes, accessories, etc. |
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.