YZ250F

Yamaha Off Road Motorcycles - YZ250F

YZ250F

2019 Off Road Motorcycles

Equipped with the most advanced performance-boosting technology in its class, the YZ250F’s all-new engine is the most powerful production 250cc 4-stroke ever manufactured by Yamaha.

Tune. Race. Win.

Its new lightweight electric starter saves valuable seconds when it matters – and with Yamaha’s exclusive Power Tuner app and adjustable mapping, it’s easy to choose the exact power profile for optimum race results at every track.

The compact new chassis increases agility – and new suspension systems deliver winning performance with class-leading feel. So expect more. Because the all-new Yamaha YZ250F gives you the highest level of tuneable performance ever seen in the 250cc class.

Details

•  All-new DOHC 250cc liquid cooled 4-stroke engine
•  ‘On the fly’ 2-position engine mapping switch
•  Power Tuner smartphone app for trackside tuning
•  Slim and compact new bodywork and seat
•  Lightweight electric starter with li-ion battery
•  New larger diameter Air-Oil-Separate front forks
•  New stronger bilateral aluminium beam frame
•  New heavy-duty clutch with lighter feel at lever
•  Light rear shock with improved damping performance
•  Redesigned air filter box
•  New high-efficiency angled radiator design
•  New high specification cam chain assembly

Features

Yamaha Off Road Motorcycles - YZ250F

New engine

The liquid-cooled, DOHC 4-valve, 250cc fuel-injected engine features a forward-positioned straight downdraft intake with symmetrical intake and exhaust ports. A new higher-compression piston and new valves deliver outstanding engine character with a focus on top-end power delivery, and the lighter cylinder is more upright to improve mass-centralization.

Yamaha Off Road Motorcycles - YZ250F

Exclusive Power Tuner App

Like the flagship YZ450F, the all-new YZ250F now features a Communication Control Unit (CCU) as standard. Using the Power Tuner app, you can adjust air/fuel mixture and ignition timing maps to tune engine performance for track conditions, record race log information, and monitor a range of data such as maintenance, diagnosis, run time, and more.

Yamaha Off Road Motorcycles - YZ250F

New ECU map switch

The new two-mode switchable engine mapping allows you to instantly adjust engine character ‘on the fly’ with the push of a button, making it easy to fine tune the YZ250F for changing track or weather conditions while riding, or in between motos or practice sessions.

Yamaha Off Road Motorcycles - YZ250F

Lightweight electric starter with lithium-ion battery

Mounted near the chassis centre to maintain a good weight balance, the YZ250F’s light and compact new electric starter system ensures instant restarts during races and saves you time and effort. Powered by a high-capacity and ultra-lightweight four-cell lithium-ion battery, the system adds minimal weight.

Yamaha Off Road Motorcycles - YZ250F

Compact new body and seat design

The YZ250F features new bodywork from tip to tail, including a new compact fuel tank specifically designed for motocross demands. In addition to shaving weight, the new body design is narrow for more comfortable knee grip and feeling of control, and the seat is updated to give the rider additional room to move aboard the machine.

Yamaha Off Road Motorcycles - YZ250F

New bilateral beam frame

The YZ250F’s all-new bilateral beam frame further heightens the sense of agility to make the new model one of the best handling bikes in its class. Larger upper frame bracing improves rigidity and durability, while wider rear frame spars and all-new engine mounts centralize mass for the best possible balance of bump absorption, stiffness and feeling of grip.

Yamaha Off Road Motorcycles - YZ250F

New suspension

Larger diameter KYB® coil spring-type forks give optimized rigidity for improved feel – while a refined speed-sensitive damping mechanism provides exceptional balance for race-winning handling. A new lightweight KYB® rear shock has been developed for the new chassis and features an increased reservoir capacity for more controlled damping characteristics.

Yamaha Off Road Motorcycles - YZ250F

New lighter-feeling clutch

To match the new engine, the 2019 YZ250F is equipped with an all-new clutch with a reduced spring load, giving a much lighter feel at the clutch lever, with excellent operational feel at half clutch. Featuring much thicker friction plates, this heavy-duty clutch ensures enhanced performance, excellent controllability and increased durability.

Yamaha Off Road Motorcycles - YZ250F

Updated radiator design

New larger radiators are angled more directly into the incoming air flow for improved cooling under the most demanding race conditions. Inside the engine the water pump is equipped with a new aluminium impeller, and features rerouted coolant pipes that enhance durability under the toughest racing conditions.

Yamaha Off Road Motorcycles - YZ250F

New axle brackets & wheel collars

To give improved feedback from the track surface when braking, the YZ250F’s new forks are fitted with larger front axle brackets featuring new shape wheel collars that ensure a higher level of front end rigidity. The increased sensitivity enables you to assess the front wheel traction levels more accurately, giving you greater control.

Yamaha Off Road Motorcycles - YZ250F

New cam chain assembly

To accommodate the engine’s higher performance, there’s a new high specification cam chain guide manufactured from Hydrogenated Nitrile Butadiene Rubber (HNBR), giving excellent mechanical strength and high resistance to heat, oil and pressure. Featuring a newly designed tensioner, the new assembly reduces the load and offers greater stability.

Colours

Yamaha Off Road Motorcycles - YZ250F

Racing Blue