New Yamaha YZ250F and Monster editions highlight 2021 models

Covers are lifted from entire range of latest YZ competition bikes.

Image: Supplied.

An upgraded YZ250F and all-new Monster Energy Yamaha Racing Editions headline the 2021 Yamaha motocross range, which has officially broken cover globally today.

The 2021 Yamaha YZ250F features a thoroughly refined engine, revised frame, new suspension settings and brakes to deliver more class-leading power and offer a superior balance of nimble, yet confidence-inspiring handling.

Available in Team Yamaha Blue and the Monster Energy Yamaha Racing Edition, the latest YZ250F has a new cylinder-head with an improved intake port shape and new camshaft profiles, as well a new air-box and intake track, a new silencer and an updated ECU. These modifications, along with other refinements like an updated transmission and shift cam, a revised clutch design and improved water pump impeller, all help to produce stronger mid to top-end power and increased peak power, while retaining its class-leading low-end torque.

Tuned specifically for the 2021 YZ250F, the updated lightweight aluminium, bilateral beam frame and new engine mounts have been redesigned with all-new flex characteristics to improve bump absorption, traction and cornering performance. The industry-leading, fully-adjustable KYB coil spring-type fork with enhanced speed-sensitive damping provides an exceptional balance between comfort and bottoming resistance while the link-type rear suspension features a KYB shock with revised damping characteristics to match the updated chassis.

Other chassis components such as the top triple clamp, handlebar mounts and front axle were also redesigned to complement the new frame. Improved braking performance is achieved with newly engineered lighter weight front and rear brake calipers, larger surface area brake pads and redesigned 270mm front and 240mm rear discs.

Standard equipment includes electric start, a lightweight lithium battery, advanced fuel injection, a front-positioned intake, and rear-positioned exhaust layout to deliver the widest spread of power with reliable performance while balancing the weight for excellent mass-centralisation. Racers can adjust their engine performance straight from their phone using the onboard wireless connectivity through the complete tuning system, which is highlighted by the Yamaha Power Tuner App.

The 2021 YZ450F returns with all of the class-leading features first introduced on the current model. Racers can achieve quicker, smoother race starts through Yamaha’s Launch Control System, adjust their on-track performance using the onboard wireless connectivity through the free of charge Yamaha Power Tuner App right from their phone and choose between two user-defined ECU maps on the fly through the handlebar-mounted dual-mode engine map switch.

Yamaha’s YZ125 and YZ250 models return for 2021 to complete Yamaha’s full-size line-up of motocross bikes. With their modern styling, lightweight aluminium frame and industry-leading KYB Speed Sensitive System front forks and KYB fully-adjustable rear shock, the 2021 YZ125 and YZ250 continue their outstanding performance and durability with a rider-friendly chassis and race-ready features.

The 2021 YZ125 and YZ250 come fitted with race kits in Australia to make them even more competitive. For the 125, it has a GYTR silencer and exhaust, V-Force Reed Block, 48T GYTR Sprocket and GYTR Launch Master are specified with a value of $1275 RRP. The 250 includes a GYTR silencer and exhaust, V-Force Reed Block, 48T GYTR Sprocket and GYTR Launch Master valued at $882.80.

Yamaha’s 2021 youth models are once again ready to tackle the track. The YZ65 and YZ85/LW are powered by confidence-inspiring 65cc and 85cc two-stroke engines. Featuring the Yamaha Power Valve System, these engines deliver a broad spread of power and torque across the entire rev range, without losing any power at high RPM.

Fully adjustable, industry-leading 36mm KYB spring type forks and KYB rear shock contribute to class-leading handling and performance in a wide range of conditions. Four-way, adjustable handlebar positioning, as well as lever-reach adjustability are designed for ultimate rider comfort, regardless of size. Finally, with two-stroke ease of maintenance and Yamaha’s proven durability, the 2021 YZ85/LW and YZ65 are built to keep kids on the track.

In the world of competition enduro models, the 2021 YZ450FX has been reworked to remain at the top of its class. The new 449cc, liquid-cooled, four-stroke, electric start engine features an all-new compact cylinder head with redesigned combustion chamber shape, and steeper valve angles. The rearward-slanted cylinder houses a higher compression piston with low friction rings attached to a longer connecting rod.

The transmission has been refined to provide smoother shifting, and a more efficient crank breather system has been adopted to decrease pumping losses. In all, the lighter, more compact engine produces increased power across the entire RPM range for stronger and more linear pulling power.

The latest evolution of Yamaha’s lightweight aluminium bilateral beam frame has been redesigned with all-new flex characteristics that provide improved cornering performance, traction and bump reaction to give the rider more confidence to push harder in any off-road condition. Other chassis components such as engine mounts, top triple clamp and front axle, as well as the class-leading KYB suspension with enhanced compression and rebound characteristics were carefully refined to reduce weight while improving handling and performance.

To bring the new package to a stop, the 2021 YZ450FX features a newly designed front brake caliper, brake pads and front and rear disc. The combined changes to the new 2021 YZ450FX deliver increased power output with more controllable, linear acceleration and lightweight handling characteristics that mimics the YZ250FX.

To further showcase the YZ450FX’s cross country edge, electric start, a lightweight lithium battery, and advanced fuel injection are all standard features. The front-positioned intake and rear-positioned exhaust layout deliver the widest spread of reliable power while balancing the weight for excellent mass-centralisation.

This enduro racer also continues to feature Yamaha’s advanced racing technology. The dual-mode switchable engine mapping and wireless connectivity is handled through the industry’s only free of charge complete tuning system, which is highlighted by the Yamaha Power Tuner App.

In Australia, both YZ250FX and 450FX come with a rec rego kit – that includes a headlight – to enable these models to be registered in applicable states such as Victoria. The otherwise unchanged YZ125X, YZ250X and YZ250FX are also available in the new trick blue/black plastics combo and all come with the rec rego kits in Australia.

For further information on the complete line of 2021 Yamaha YZ competition models including specific release dates and pricing, visit the brand’s official website at


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