14 August. Friday 2026
Yamaha YZ125X - 2021 Specifications and Reviews
The 2021 Yamaha YZ125X is a lightweight enduro bike designed for young riders and beginners seeking an affordable entry point into off-road riding. Powered by a nimble 125cc two-stroke engine with liquid cooling and a six-speed transmission, it delivers responsive performance and easy handling on varied terrain. Known for its reliability, low maintenance costs, and excellent maneuverability, the YZ125X excels as a training platform and recreational trail bike.
General information | |
| Price as new | 3.5 Check out the detailed rating of off-road capabilities, engine performance, maintenance cost, etc. Compare with any other bike. |
| Category | Enduro / offroad |
| Year | 2021 |
| Model | Yamaha YZ125X |
Engine and Transmission Specifications | |
| Clutch | O-ring chain |
| Transmission type | Chain (final drive) |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Lubrication system | Premix |
| Ignition | CDI |
| Fuel system | Carburettor. Mikuni TMX 38 |
| Bore x Stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Compression | 8.8:1 |
| Engine details | Reed-valve-inducted |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 125.0 ccm (7.63 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Wheels | Dunlop® AT81 tires |
| Rear brakes | Single disc. Hydraulic. |
| Diameter | 270 mm (10.6 inches) |
| Front brakes | Single disc. Hydraulic. |
| Rear tire | 110/90-18 |
| Front tire | 90/90-21 |
| Rear wheel travel | 315 mm (12.4 inches) |
| Rear Suspension | KYB® single shock; fully adjustable |
| Front wheel travel | 300 mm (11.8 inches) |
| Front Suspension | KYB® Speed-Sensitive System inverted fork; fully adjustable |
| Trail | 117 mm (4.6 inches) |
| Rake (fork angle) | 26.8° |
| Frame type | Semi-double cradle aluminium frame |
| | |
Physical measures and capacities | |
| Oil capacity | 0.70 litres (0.74 US quarts) |
| Fuel capacity | 8.00 litres (2.11 US gallons) |
| Wheelbase | 1455 mm (57.3 inches) |
| Ground clearance | 351 mm (13.8 inches) |
| Overall width | 825 mm (32.5 inches) |
| Overall length | 2141 mm (84.3 inches) |
| Overall height | 1285 mm (50.6 inches) |
| Seat height | 975 mm (38.4 inches) If adjustable, lowest setting. |
| Weight incl. oil, gas, etc | 94.8 kg (209.0 pounds) |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Factory warranty | 30 Day Limited Factory Warranty |
| Starter | Kick |
| Color options | Team Yamaha Blue |
Performance Profile & Rider Fit
Best For
Track55%
City10%
Cornering85%
Daily Riding10%
Touring10%
Passenger5%
Rider Profile
| Best For | Best suited to intermediate-to-advanced off-road riders who understand 2-stroke power delivery and clutch management. |
| Purpose | Built as a cross-country/off-road competition machine, essentially a trail-tuned YZ125 motocrosser with wider-ratio gearing and off-road suspension settings. |
| Rider Fit | Very light wet weight and tall seat height demand an active, fit rider comfortable standing and shifting body weight through rough terrain. |
| Character | Raw, high-strung, and reward-driven, this bike delivers sharp, punchy 2-stroke power and razor-sharp agility for riders who like to work the bike hard. |
| Not Ideal For | Not for riders seeking comfort, highway capability, passenger accommodation, or a low-maintenance, easy-going ride. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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Rider Reviews
Total comments: 1
MotorcycleDB Review
The 2021 Yamaha YZ125X is a powerful and agile off-road motorcycle that is perfect for adrenaline junkies and motocross enthusiasts. With its lightweight frame and responsive handling, the YZ125X offers great maneuverability on challenging terrain. The 125cc liquid-cooled two-stroke engine delivers impressive power and torque, making it an ideal choice for off-road racing and trail riding. The bike's rugged construction and high-quality components ensure durability and reliability, even in the most demanding riding conditions. Overall, the Yamaha YZ125X provides an exhilarating and thrilling riding experience for those who crave adventure and excitement. In conclusion, the 2021 Yamaha YZ125X is a top-performing off-road motorcycle that delivers thrilling power and performance. Whether you're tearing up the motocross track or exploring rugged trails, the YZ125X is a capable and reliable companion. Its lightweight design, powerful engine, and durable construction make it a standout choice for riders who demand the best in off-road performance. If you're seeking a versatile and high-performing off-road motorcycle, the Yamaha YZ125X is definitely worth considering.Add a Comment
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