Description
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) |
KEY 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.
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.




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