27 July. Monday 2026
Yamaha YZ125X - 2026 Specifications and Reviews
The 2026 Yamaha YZ125X is a lightweight 125cc 2-stroke motocross bike designed for amateur and intermediate riders seeking competitive performance on the track. Known for its responsive handling, aggressive power delivery, and nimble chassis, it excels in tight technical sections while remaining manageable for developing riders advancing their racing skills.
Engine and Transmission Specifications | |
| Capacity | 125 cc |
| Final Drive | Chain |
| Gearbox | 6-speed; multiplate wet clutch |
| Induction | Hitachi Astemo® Keihin PWK38S |
| Compression Ratio | 7.8~10.2:1 |
| Bore x Stroke | 54.0 mm x 54.5 mm |
| Engine Type | 125cc liquid-cooled 2-stroke; reed-valve inducted |
| | |
Physical measures and capacities | |
| Ground Clearance | 356 mm (14´´) |
| Overall Height | 1,290 mm (50.8´´) |
| Overall Width | 825 mm (32.5´´) |
| Overall Length | 2,154 mm (84.8´´) |
| Wet Weight | 212 lb |
| Wheelbase | 57.3 in |
| Seat Height | 38.2 in |
| Fuel Capacity | 1.8 gal |
Yamaha YZ125X dimensions and frame | |
| Trail | 4.4 in |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
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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