| Generation | 2027 (new engine and frame) |
| Markets Available | Europe, USA |
| Lifecycle | new |
| Changes | Completely revised: new 250cc four-stroke engine with YZF-R1-derived finger followers, compression up to 14.1:1 (from 13.8:1), rev limit +700 rpm, dry-sump lubrication, new gear ratios, hydraulic clutch; aluminium frame, suspension and bodywork from the YZ450F with model-specific settings; smaller rear brake (220 instead of 240 mm); ECU lock via Power Tuner app. |
Video
| Vehicle Type | offroad |
| Target Audience | Ambitious motocross riders and MX2-class racers |
| Engine Type | Single-cylinder four-stroke, liquid-cooled, DOHC, 4 valves, finger-follower valvetrain |
| Cylinders | 1 |
| Displacement | 250 ccm |
| Bore x Stroke | 77,0 x 53,6 mm |
| Compression Ratio | 14,1:1 |
| Fuel System | Mikuni fuel injection, 44 mm throttle body |
| Cooling | Liquid-cooled |
| Lubrication | Dry sump |
| Transmission | 5-speed |
| Final Drive | Chain |
| Clutch | Hydraulically actuated wet multi-plate clutch with diaphragm spring |
| Starter | Electric |
| Frame Type | Aluminium bilateral beam frame (from the YZ450F) |
| Front Fork | KYB Speed Sensitive System USD fork, fully adjustable |
| Fork Brand | KYB |
| Front Travel | 310 mm |
| Front Suspension Adj. | Preload, rebound and compression |
| Rear Shock | KYB monoshock with linkage, fully adjustable, hand-operated low-speed compression adjuster |
| Shock Brand | KYB |
| Rear Travel | 312 mm |
| Rear Suspension Adj. | Preload, rebound and compression (high/low speed) |
| Front Disc Count | 1 |
| Front Disc Size | 270 mm |
| Rear Disc Size | 220 mm |
| ABS | No |
| Seat Height | 970 mm |
| Wheelbase | 1,481 mm |
| Rake | 27 ° |
| Trail | 119 mm |
| Wet Weight | 107 kg |
| Fuel Capacity | 6.1 L |
| Length | 2,184 mm |
| Width | 826 mm |
| Height | 1,275 mm |
| Ground Clearance | 351 mm |
| Front Tire | 80/100-21 |
| Rear Tire | 110/90-19 |
| Spoke Wheels | Yes |
| Riding Modes | Yes |
| Mode Names | Maps via Yamaha Power Tuner app (Quick Setting), handlebar map switch |
| Traction Control | Yes |
| TC Deactivatable | Yes |
| Launch Control | Yes |
| Launch Control Type | Launch Control System via Power Tuner app |
| Cruise Control | No |
| Connectivity | Yamaha Power Tuner app (Wi-Fi), incl. ECU lock |
| Headlight | None (competition model) |
| Market Launch | September 2026 |
| Colors | Icon Blue |
| A2 Compatible | No |
| Market Note | Pure competition model, not road legal – for closed-course use only. Specs per Yamaha USA spec sheet (converted to mm/kg); Yamaha does not publish power figures. |
| Confirmation Source | Yamaha Motor Europe / Yamaha Motor Corp. USA – 2027 Off-Road Competition range (June 2026) |
Strengths & Weaknesses
Strengths
- All-new, higher-revving engine, hydraulic clutch, YZ450F-derived chassis, fully adjustable KYB SSS suspension, Power Tuner app with traction and launch control, electric start
Weaknesses
- Not road legal, Yamaha publishes no power figures, no official German price, high maintenance typical of a competition engine

