Yamaha has unveiled its 2027 off-road competition range, with the spotlight firmly on an all-new YZ250F, an updated YZ450FX cross-country racer and a significantly revised YZ85/YZ85LW package aimed at developing junior talent.
Leading the charge is the YZ250F, a bike that already boasts one of the strongest resumes in the class after helping riders like Haiden Deegan and Cole Davies dominate the 2026 US Supercross season. For 2027, Yamaha has gone far beyond a routine update, delivering a completely redesigned engine and extensive chassis changes.
The new 250cc four-stroke engine has been developed to deliver greater power across the rev range while extending the rev limit by 700rpm. A finger-follower valvetrain derived from Yamaha’s YZF-R1 sportsbike allows the engine to rev harder while maintaining a more linear and controllable character. Intake refinements further improve airflow, while revisions to the airbox and exhaust system ensure compliance with current FIM and AMA noise regulations.
One of the most significant upgrades is the introduction of a hydraulic clutch. Replacing the previous coil-spring arrangement, the new system promises a lighter lever pull, smoother engagement and more consistent performance throughout a moto, while eliminating the need for clutch adjustments during the day.
The chassis has also received major attention. The YZ250F adopts the same aluminium bilateral beam frame architecture used on the YZ450F, with revised rigidity characteristics designed to improve front-end feel, cornering precision and overall stability. New engine brackets and updated KYB suspension settings complement the package, resulting in a bike Yamaha says is easier to place into ruts, more predictable through rough sections and less demanding to ride over a full race distance.
Further updates include a redesigned rear braking system aimed at improving feel and reducing unsprung weight, refreshed bodywork and a new honeycomb-pattern seat cover. Yamaha’s Power Tuner App also gains an ECU lock function, allowing owners to disable engine starting via a password-protected setting.
The new YZ250F will arrive at Australian dealerships in August, priced at $15,049 ride-away, while the Monster Energy Yamaha Racing Edition follows in September for $15,149.
YZ450FX BENEFITS FROM YZ450F DEVELOPMENT
Cross-country riders haven’t been forgotten either, with the YZ450FX receiving a substantial update based on Yamaha’s latest YZ450F motocross platform.
While the YZ450F itself remains largely unchanged for 2027, the FX benefits from the latest engine, frame and suspension package, with tuning specifically aimed at technical off-road conditions. Yamaha has focused on delivering smoother low- to mid-range power, helping riders tackle tight trails, rocky climbs, and demanding cross-country terrain with less effort.
Engine updates include revised cam timing and a new AC magneto rotor, while a larger 51-tooth rear sprocket improves low-speed tractability and reduces rider fatigue. The new hydraulic clutch delivers a claimed 15 per cent lighter pull than before, improving control during technical riding situations.
The updated frame and revised KYB suspension settings are designed to increase comfort and compliance over roots, rocks and slippery terrain without sacrificing high-speed stability. The result is a machine Yamaha says is easier to ride faster for longer.
The YZ450FX is scheduled to arrive in October with a ride-away price of $16,599.
BIG IMPROVEMENTS FOR YAMAHA’S MINI RACER
The YZ85 and YZ85LW also receive one of their biggest updates in recent years. Yamaha has targeted improvements in rideability, durability, and ease of use to help young riders progress through the ranks.
Engine changes include a new MotoTassinari VForce4R reed valve, a revised power valve, an updated air filter design, and new carburettor and CDI settings. A heavier flywheel has also been fitted to improve power delivery and acceleration feel. Cooling performance and durability have been enhanced through revisions to the cylinder head, water pump and transmission components.
On the chassis side, new engine and swingarm brackets improve rigidity, balance, and cornering confidence, while sealed front-wheel bearings boost durability and reduce maintenance requirements. A quicker-action throttle rounds out the updates.
The YZ85 and YZ85LW arrive in July, priced at $8249 and $8699, respectively, while the YZ65 receives several of the durability upgrades and lands in August, priced at $6899.
Visit www.yamaha-motor.com.au/ for more info.
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