The YZ125X is focused on enduro competition with an 18-inch rear wheel, larger rear sprocket, side stand, sealed O-ring chain, reserve fuel petcock and a new water-resistant PVC handle bar pad, all adding up to exceptional cross country performance.
Review – Key Features – Features & Benefits – Specifications
2026 Yamaha YZ125X: VICTORY: TWO‑STROKE TRAILBLAZER.
Introducing the new 2026 Yamaha YZ125X…
The YZ125X sets the standard for light, fast two‑stroke fun! The perfect entry into the world of XC and enduro competition.
The YZ125X sets the standard for light, fast two-stroke fun! The perfect entry into the world of XC and enduro competition, this two-stroke trailblazer combines thrilling performance and ultimate reliability for all your wins.
125cc DISPLACEMENT
212 lb WET WEIGHT
38.2 in SEAT HEIGHT
57.3 in WHEEL BASE
2026 Yamaha YZ125X Totalmotorcycle.com Key Features
- Liquid-cooled 125cc two-stroke engine
- High-precision Hitachi Astemo® Keihin PWK38S carburetor features a power jet, throttle position sensor and 3D-map-controlled CDI unit for precise ignition timing
- Braking system features large front pistons, rigid caliper and a 270mm front rotor
- Model-specific CDI unit
- Racing intake system
- Ultra-lightweight YZ125-spec frame
- Industry-leading, XC-specific adjustable KYB suspension
- Smooth shifting, 6-speed, close ratio transmission
Two-Stroke Power: Tuned for Enduro
The YZ125X’s advanced, liquid-cooled 125cc two-stroke engine utilizes a revised compression ratio, revised YPVS timing and a model-specific digital CDI unit compared to its motocross sibling—all focused on creating a broad, usable power delivery specifically suited to cross country and enduro-style competition.
Lightweight Aluminum Frame
The lightweight, race-proven YZ125-spec aluminum semi-double cradle frame is engineered to provide the perfect balance of rigidity and flex for competition-ready handling character and composure. Removable aluminum rear subframe is constructed of square-section tubing for reduced weight.
Class-Leading Suspension
Yamaha’s renowned Speed Sensitive System KYB® spring-type front fork is matched with a high performance KYB® long-travel rear shock, both fully adjustable and tuned for the specific demands of cross country racing.
Premium Wheels & Tires
Slick blue Excel® rims provide exceptional durability and a premium look. They come wrapped in high performance Dunlop® Geomax MX33 tires offering race-developed performance for a wide range of terrain.
Cross Country Features
The YZ125X is built for competition with an 18-inch rear wheel, enduro-focused suspension setup, larger rear sprocket, side stand, sealed O-ring chain and reserve fuel petcock, all adding up to exceptional cross country performance.
2026 Yamaha YZ125X Totalmotorcycle.com Features and Benefits
ENGINE
The YZ125’s liquid-cooled 125cc two-stroke engine provides thrilling mid- to high-rpm power, along with supreme usability.
A revised compression ratio, revised YPVS timing and model-specific CDI unit create broad, usable power suited to cross country.
Intake design allows for a straighter, more efficient draw of air into the intake tract.
High-precision Hitachi Astemo® Keihin PWK38S carburetor provides clean, crisp throttle response and superior rideability.
An advanced, close-ratio six-speed transmission has wide gear teeth and optimized gear ratios for maximum performance.
A compact exhaust expansion chamber improves clearance in tight terrain while providing excellent exhaust efficiency.
Large-capacity radiator with dark louvers deliver an aggressive look and maximum cooling efficiency.
CHASSIS/SUSPENSION
Best-in-class Speed Sensitive 48mm KYB® fork is tuned for cross country, offering precise damping and 11.8 inches of travel.
Race-proven aluminum semi-double cradle frame provides the perfect balance of rigidity and flex for exceptional handling.
Removable aluminum rear subframe is constructed of square-section tubing for reduced weight.
Fully adjustable KYB® shock provides exceptional rear wheel control, class-leading capability and 12.4 inches of travel.
High performance braking system features 270mm front rotor, 240mm rear rotor, large front pistons and rigid calipers.
Tapered aluminum handlebar include adjustable mounts for more comfortable ergonomics.
Slick blue Excel® rims provide exceptional durability and a premium look.
High performance Dunlop® Geomax MX33 tires offer outstanding cornering traction, stability and feel.
ADDITIONAL FEATURES
A flat seat, narrow fuel tank and well-integrated body panels combine to create greater freedom of movement.
Enduro features include an 18-inch rear wheel, larger rear sprocket, side stand, sealed O-ring chain and reserve fuel petcock.
Premium embedded Yamaha graphics highlight the YZ family pedigree and provide excellent durability.
TOP FEATURES
Two-Stroke Power: Tuned for Enduro Racing
The YZ125X is optimized for the unique demands of Hare Scrambles and GNCC® racing. The powerful Yamaha Power Valve System (YPVS™)-equipped 125cc two-stroke engine is mated to a six-speed transmission for the ultimate cross country powerplant.
Lightweight Aluminum Frame
Ultra-lightweight YZ125-spec aluminum semi-double cradle frame is engineered to provide the perfect balance of rigidity and flex for competition-ready handling character and composure.
High Performance Braking System
High-spec front and rear brake setup offer exceptional power and feel, while reducing unsprung weight.
Industry-Leading Suspension
Yamaha’s renowned Speed Sensitive System KYB® spring-type front fork is matched with a high performance KYB® long-travel rear shock, both fully adjustable and tuned for the specific demands of cross country racing.
Bold YZ Styling
Along with slim, aggressive bodywork, the bold graphics scheme further highlights the YZ family pedigree. Premium Yamaha graphics are now embedded to provide excellent durability and scratch resistance.
GNCC®-Specific Features
Cross country focused suspension setup, optimized YPVS™ settings, lightweight Excel® wheels paired with Dunlop® Geomax MX33 tires, sealed O-ring chain, standard side stand and fuel tank petcock with reserve position all combine to make the perfect GNCC® racer.
ENGINE
Powerful 125cc Two-Stroke Engine
The YZ125X’s advanced, liquid-cooled 125cc two-stroke engine provides impressive acceleration, thrilling mid- to high-rpm power, along with supreme usability.
Tuned for GNCC® Competition
The YZ125X utilizes a revised compression ratio, revised YPVS™ timing and a model-specific digital CDI unit compared to its motocross sibling””all focused on creating a broad, usable power delivery specifically suited to cross country and enduro-style competition.
Efficient Air Intake Design
Intake design allows for a straighter, more efficient draw of air into the intake tract.
Precise Fueling
Refined Hitachi Astemo® Keihin PWK38S carburetor features a power jet, throttle position sensor and 3D-map-controlled CDI unit for precise ignition timing. The result is clean, crisp throttle response, superior rideability and excellent over-rev character.
Close-Ratio Six-Speed Transmission
An advanced, close-ratio six-speed transmission has wide gear teeth and optimized gear ratios for maximum performance.
Narrow Exhaust Pipe
The compact exhaust expansion chamber provides both horizontal and vertical clearance on tight, technical courses while still providing excellent exhaust efficiency.
New High-Capacity Radiator
A new high-capacity radiator with dark louvers delivers aggressive looks and improved cooling efficiency for demanding cross country racing conditions.
CHASSIS/SUSPENSION
Lightweight Frame
Race-proven, highly developed aluminum semi-double cradle frame is engineered to provide the perfect balance of rigidity and flex for competition-ready handling character and composure. Removable aluminum rear subframe is constructed of square-section tubing for reduced weight.
Industry-Leading KYB® Fork
Tuned for the demands of cross country racing, the Speed Sensitive System 48mm inverted KYB® fork includes a leaf spring in the mid-speed valve for more precise damping and increased comfort, while offering up 11.8 inches of travel. Additionally, a scraper between the dust and oil seal improves reliability in cross country conditions. New for 2025, the fork now includes a hand-adjustable knob for quick, toolless compression adjustments.
Advanced KYB® Shock
Fully adjustable KYB® rear shock features reduced-friction Kashima Coat™ internals, separate adjusters for high- and low-speed compression damping, a full lock oil rebound system for increased comfort, and 12.4 inches of travel. It all adds up to fantastic rear wheel control and class-leading capability.
High Performance Brake System
A high performance, lightweight braking system features large front pistons, rigid calipers, and 270mm front rotor and 240mm rear rotor, all combining to provide exceptional braking power and feel along with reduced unsprung weight.
Premium Excel® Wheels & Dunlop® Tires
Slick blue Excel® rims provide exceptional durability and a premium look. They come wrapped in high performance Dunlop® Geomax MX33 tires for improved cornering traction, stability and feel.
ADDITIONAL FEATURES
Bold YZ Styling
Along with slim, aggressive bodywork, the bold graphics scheme further highlights the YZ family pedigree. Premium Yamaha graphics are now embedded to provide excellent durability and scratch resistance.
Cross Country Ergonomics
A racy “gripper”-type seat and narrow fuel tank combined with a tapered aluminum handlebar and adjustable mounts create greater freedom of movement and more comfortable ergonomics for riders.
Cross Country Features
The YZ125X is focused on enduro competition with an 18-inch rear wheel, larger rear sprocket, side stand, sealed O-ring chain, reserve fuel petcock and a new water-resistant PVC handle bar pad, all adding up to exceptional cross country performance.
*Manufacturer’s Suggested Retail Price (MSRP) shown. Does not include tax, title, prep or destination charges. Actual prices set by dealer.
**Fuel Economy is estimated.
***Wet weight includes the vehicle with all standard equipment and all fluids, including oil, coolant (as applicable) and a full tank of fuel. It does not include the weight of options or accessories. Wet weight is useful in making real-world comparisons with other models.
2026 Yamaha YZ125X – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $7,299 USD
Canada MSRP Price: $8,599 CDN
Europe/UK MSRP Price: £ NA GBP (On The Road inc 20% Vat)
ENGINE
| Engine Type | 125cc liquid-cooled 2-stroke; reed-valve inducted |
| Bore x Stroke | 54.0 mm x 54.5 mm |
| Compression Ratio | 7.8~10.2:1 |
| Fuel Delivery | Hitachi Astemo® Keihin PWK38S |
| Transmission | 6-speed; multiplate wet clutch |
| Final Drive | Chain |
| Fuel Capacity | 1.8 gal |
CHASSIS
| Suspension/Front | KYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel |
| Suspension/Rear | KYB® single shock; fully adjustable, 12.4-in travel |
| Brakes/Front | Hydraulic disc, 270mm |
| Brakes/Rear | Hydraulic disc, 240mm |
| Tires/Front | 80/100-21 Dunlop® Geomax MX33F |
| Tires/Rear | 110/100-18 Dunlop® Geomax MX33 |
DIMENSIONS
| LxWxH | 84.8 in x 32.5 in x 50.8 in |
| Seat Height | 38.2 in |
| Wheelbase | 57.3 in |
| Rake (Caster Angle) | 26.4° |
| Trail | 4.4 in |
| Max. Ground Clearance | 14.0 in |
| Fuel Capacity | 1.8 gal |
| Wet Weight*** | 212 lb |
OTHER
| Warranty | 30 Day (Limited Factory Warranty) |
*Manufacturer’s Suggested Retail Price (MSRP) shown. Does not include tax, title, prep or destination charges. Actual prices set by dealer.
**Fuel Economy is estimated.
***Wet weight includes the vehicle with all standard equipment and all fluids, including oil, coolant (as applicable) and a full tank of fuel. It does not include the weight of options or accessories. Wet weight is useful in making real-world comparisons with other models.
2026 Yamaha YZ125X – Totalmotorcycle.com Canada Specifications/Technical Details
Engine
| Engine | 2-stroke, liquid-cooled, reed-valve, single |
| Displacement | 125 cc |
| Bore and Stroke | 54.0 x 54.5 mm |
| Compression Ratio | 7.8~10.2:1 |
| Fuel Delivery | Hitachi Astemo® Keihin PWK38S |
| Ignition / Starting | CDI / Kick |
| Transmission | Constant mesh, 6-speed |
| Final Drive | Chain |
Chassis
| Suspension (Front) | Fully adjustable 48 mm KYB inverted fork / 300 mm (11.8″) travel |
| Suspension (Rear) | Fully adjustable KYB link Monocross / 315 mm (12.4″) travel |
| Brakes (Front) | 270 mm floating disc / twin piston caliper |
| Brakes (Rear) | 240 mm disc / single piston caliper |
| Tires (Front) | 80/100-21 |
| Tires (Rear) | 110/100-18 |
Critical Data
| Length | 2,154 mm (84.8″) |
| Width | 825 mm (32.5″) |
| Height | 1,290 mm (50.8″) |
| Wheelbase | 1,455 mm (57.3″) |
| Ground Clearance | 356 mm (14″) |
| Seat Height | 970 mm (38.2″) |
| Fuel Capacity | 8 litres (1.8 imp. gallons) |
| Wet Weight | 96 kg (212 lb) |
| Colour(s) | Team Yamaha Blue |
2026 Yamaha YZ125X – Totalmotorcycle.com European Specifications/Technical Details
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Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).
