14 August. Friday 2026
Yamaha YZ125 - 2025 Specifications and Reviews
The 2025 Yamaha YZ125 is a lightweight two-stroke motocross machine designed for beginner to intermediate riders seeking an affordable entry into competitive racing. Known for its punchy 125cc engine and nimble handling, this bike excels in amateur racing and recreational trail riding with excellent power delivery and easy maintenance.
General information | |
| Color Options | Team Yamaha Blue |
| Price | US$ 7099. MSRP depends on country, taxes, accessories, etc. |
| Category | Cross / motocross |
| Model | Yamaha YZ125 |
Engine and Transmission Specifications | |
| Starting | Kick |
| Clutch | Multiplate wet clutch |
| Final Drive | Chain (final drive) |
| Gearbox | 6-speed |
| Cooling System | Liquid |
| Induction | Carburettor. Hitachi Astemo® Keihin PWK38S carburetor |
| Bore x Stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Compression Ratio | 10.1:1 |
| Engine Details | Reed-valve-inducted |
| Capacity: | 125.0 ccm (7.63 cubic inches) |
Physical measures and capacities | |
| Fuel Capacity | 6.81 litres (1.80 US gallons) |
| Wheelbase | 1445 mm (56.9 inches) |
| Ground Clearance | 366 mm (14.4 inches) |
| Overall Width | 826 mm (32.5 inches) |
| Overall Length | 2136 mm (84.1 inches) |
| Overall Height | 1295 mm (51.0 inches) |
| Seat Height | 980 mm (38.6 inches) If adjustable, lowest setting. |
| Wet Weight | 94.8 kg (209.0 pounds) |
| | |
Yamaha YZ125 dimensions and frame | |
| Wheels | Bridgestone® Battlecross X20 tires. |
| Rear Brakes | Single disc. Hydraulic. |
| Brake Disc Diameter | 240 mm (9.4 inches) |
| Front Brakes | Single disc. Hydraulic. |
| Rear Tyre | 100/90-19 |
| Front Tyre | 80/100-21 |
| 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 | 109 mm (4.3 inches) |
| Frame | Aluminum semi-double cradle |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Fork tube size | 48 mm (1.9 inches) |
| Tire pressure rear | 15 PSI (1 Bar or 100 kPa) |
| Tire pressure front | 15 PSI (1 Bar or 100 kPa) |
| Spark plugs | NGK BR9EVX, NGK BR9EIX |
| Brake fluid | DOT 4 |
| Update specs | Report missing specs or required updates. |
| Warranty | 30 Day Limited Factory Warranty |
| Oil capacity | 0.70 litres (0.74 US quarts) |
| Rake (fork angle) | 26.0° |
| Driveline | Constant-mesh |
| Engine type | Single cylinder, two-stroke |
| Model year | 2025 |
Performance Profile & Rider Fit
Best For
Track85%
City5%
Cornering90%
Daily Riding5%
Touring5%
Passenger0%
Rider Profile
| Best For | This is a full-on competition motocross bike best suited to intermediate through expert off-road riders who understand 2-stroke power delivery and clutch management. |
| Purpose | Built purely for motocross racing and aggressive trail riding, not for commuting, road use, or casual leisure riding. |
| Rider Fit | The tall 38.6-inch seat height, light 212 lb wet weight, and peaky 2-stroke power demand an active, fit rider comfortable standing and shifting body weight constantly. |
| Character | A raw, high-revving 2-stroke racer that rewards precise clutch and throttle control with explosive acceleration and razor-sharp handling on dirt. |
| Not Ideal For | Not for beginners, road riders, passengers, or anyone wanting comfort, storage, or long-distance capability. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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