Yamaha has unleashed its 2027 YZ motocross range, headlined by a sharp new 2027 Yamaha YZ250F alongside the returning YZ450F for the new season.

The YZ250F is the proven class leader in the 250 four-stroke category, and the all-new 2027 model adopts significant changes including a redesigned engine and updated chassis to make the class-defining middle-weight machine even better.

Updates include engine designed for high-revving performance that delivers a linear engine response with more power and torque through the rpm range, increasing the redline by 700 rpm from the previous model.

It has a YZF-R1 superbike-derived rocker arm with finger follower system, and intake refinements that allow for increased airflow and higher revs, plus noise-compliance that meets FIM/AMA regulations with a tuned exhaust note.

A new hydraulic clutch – like the YZ450F received last year – has been introduced for smooth, consistent engagement requiring less effort while eliminating the need for on-track adjustments.

Also from the YZ450F, the advanced aluminum bilateral beam frame for an unrivaled balance of rigidity and flex characteristics. It features new engine brackets designed for optimized rigidity, improving comfort and straight-line stability with a more manageable character and a predicable response.

Riders will benefit from new high performance KYB rear shock and revised fork settings with enhanced damping characteristics, enhancing traction and comfort through the bumps, square edges, and jump faces/landings.

Also, a new lightweight compact braking system that delivers improved control with a linear buildup of stopping power, while the rear brake pedal tip has been updated with bolt-type fasteners instead of rivets for simplified maintenance.

Updated styling includes a slimmer, more compact front number plate, new two-piece side covers, sharper rear fender and new YZ graphics – again aligning with the current 450 class entry from Yamaha.

The 2027 Yamaha YZ450F, which was heavily updated for the 2026 model year, returns once again and – like the YZ250F – will also be available in a Monster Energy Edition.