The Yamaha YZ125 motorcycle specifications include a 124 cc (7.57 cu in) engine, a 6-speed gearbox, and a listed weight of 86.2 kg (190 lb).
Key specifications
2008-2023Model years
124 ccDisplacement
86.2 kgDry weight
998 mmSeat height
7.9 LFuel tank
1,443 mmWheelbase
386 mmGround clearance
Model years covered
2008200920102011201220132014201520162017201820192020202120222023
Year-specific specification changes
The 2008 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
Compression ratio
2017202210.7:1
202310.1:1
Displacement
20192023125 cc (7.63 cu in)
Engine type
20092023Single cylinder, two-stroke
Front brakes
2011Single disc. Wave
2012Single disc. Hydraulic
20132014Single disc. Hydraulic disc. Hydraulic disc.
20152021Single disc. Hydraulic.
2022Single disc. Hydraulic. Nissin 2-piston caliper
2023Single disc. Hydraulic.
Front suspension
20182023KYB® Speed-Sensitive System inverted fork; fully adjustable
Front tire
2010201180/100-M21
201280/100-21
2015202380/100-21
Rear brakes
2011Single disc. Wave
2012Single disc. Hydraulic
20152021Single disc. Hydraulic.
2022Single disc. Hydraulic. Nissin 1-piston caliper
2023Single disc. Hydraulic.
Rear suspension
20182023KYB® single shock; fully adjustable
Wheelbase
202220231,445 mm (56.9 inches)
Fuel capacity
201120167.95 L (2.10 US gal)
201720218.00 L (2.11 US gal)
202220236.81 L (1.80 US gal)
Ground clearance
20152023366 mm (14.4 inches)
Overall height
201520231,295 mm (51.0 inches)
Overall width
20222023826 mm (32.5 inches)
Seat height
20152021975 mm (38.4 inches)
20222023980 mm (38.6 inches)
How the Yamaha YZ125 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.
Displacement124 cc
Low 49 ccAverage 550 ccHigh 1,852 cc
About 77% lower than the Yamaha database average. Around the 18th percentile across Yamaha models.
Seat height998 mm
Low 635 mmAverage 793 mmHigh 989 mm
About 26% taller than the Yamaha database average. Around the 99th percentile across Yamaha models.
Fuel capacity7.9 L
Low 4 LAverage 13 LHigh 24 L
About 39% smaller than the Yamaha database average. Around the 24th percentile across Yamaha models.
This model Yamaha database average
Mechanical overview
Engine layout snapshot
Single cylinder, four-stroke • 124 cc • Liquid cooled
Chassis snapshot
Wheelbase 1,443 mmSeat 998 mmClearance 386 mm
6-speed • Chain (final drive) • 80/80-M21 front / 100/90-M19 rear
Additional useful specifications
| Front tire size |
80/80-M21 |
| Rear tire size |
100/90-M19 |
| Bore/stroke ratio |
0.99:1 (Square) |
Engine specifications
| Engine type |
Single cylinder, four-stroke |
| Displacement |
124 cc (7.57 cu in) |
| Bore × stroke |
54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Compression ratio |
8.6:1 |
| Cooling system |
Liquid |
Transmission and drivetrain
| Gearbox |
6-speed |
| Final drive |
Chain (final drive) |
Chassis and suspension
| Front suspension |
Speed-sensitive system inverted fork |
| Rear suspension |
Fully adjustable single shock |
| Front wheel travel |
300 mm (11.8 inches) |
| Rear wheel travel |
315 mm (12.4 inches) |
| Rake |
26.0° |
Brakes, wheels and tires
| Front brakes |
Single disc |
| Rear brakes |
Single disc |
| Front tire |
80/80-M21 |
| Rear tire |
100/90-M19 |
Dimensions and weight
| Dry weight |
86.2 kg (190 lb) |
| Seat height |
998 mm (39.3 inches) |
| Overall length |
2,136 mm (84.1 inches) |
| Overall width |
828 mm (32.6 inches) |
| Overall height |
1,316 mm (51.8 inches) |
| Wheelbase |
1,443 mm (56.8 inches) |
| Ground clearance |
386 mm (15.2 inches) |
Fuel and emissions
| Fuel capacity |
7.94 L (2.10 US gal) |
Other specifications
| Color options |
Blue/white |
| Price as new |
US$ 5599. 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.