Yamaha 2020 YZ250F is powerful and reliable with push‑button electric start and the smartphone power tuner app make this the moto weapon of choice.
Innovative and Upgraded Engine
The liquid-cooled, DOHC 4-valve, fuel-injected engine features a forward-positioned straight downdraft intake with symmetrical intake and exhaust ports. A high-compression piston works with intake and exhaust cam timing to deliver outstanding engine character with a focus on top-end power delivery.
Exclusive Power Tuner App
Breaking new ground in the industry – again – Yamaha created the Power Tuner app, which brings the power of the GYTR Power Tuner to your iOS® or Android® device. Using wireless connectivity to talk to the bike’s onboard CAN-bus network, the app allows owners to 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 and system diagnosis, engine run time, and more.
Electric Starter System
The YZ250F features a compact electric starter system to minimize restart delays on track and add convenience everywhere else. Powered by a high-capacity and ultra-lightweight, four-cell lithium-ion battery, the system adds minimal weight.
Adjustable Engine Maps
Two-mode adjustable engine mapping allows the rider to adjust engine character with the push of a button, making it easy to tune the
YZ250F for changing track or weather conditions.
Piston, Rod and Crankshaft Balance
A flat-top forged piston features a bridge-box design for additional strength with minimal weight. The piston, rings and DLC-coated piston pin, along with the offset cylinder configuration, all reduce friction loss and contribute to quick response. The engine’s intake ports, cam profiles, high-strength connecting rod and optimized crank and counterbalancer all work together to produce potent high-rpm power with user-friendly delivery and exceptional reliability.
Advanced Fuel Injection
The adjustable fuel injection system uses a 44mm throttle body, fed by a high-pressure electric fuel pump, injects fuel through a 12-hole Denso® injector. This ensures optimum fuel atomization and air/fuel calibration for excellent rideability in a wide range of riding
conditions.
Wraparound Rear Positioned Exhaust Layout
An innovative exhaust pipe design improves mass centralization and power development characteristics. This layout moves the rear end of the exhaust pipe farther forward and positions the muffler closer to the bike’s center of mass.
Enhanced Cooling
Lightweight radiators are larger and angled more directly in the incoming air stream, for improved cooling under the most demanding race conditions. Inside the engine, the high-flow impellor and water pump boost endurance and durability under the toughest racing conditions.
Durable Transmission
The transmission gears, dogs and shift mechanisms are designed to smooth gear changes and improve durability under the heavy demands of motocross racing. The YZ250F also features a large-diameter clutch to boost reliability even further under high-heat conditions.
Advanced Aluminum Frame
The YZ250F’s compact frame refines the instinctive handling that makes this Yamaha one of the best handling machines in the class.
Large upper frame bracing improves rigidity and durability, while wider rear frame spars and YZ250F-specific engine mounts centralize mass for the best possible balance of bump absorption, stiffness and feeling of grip.
Compact Body and Seat Design
The YZ250F utilizes compact bodywork from tip to tail, including a narrow fuel tank specifically designed for motocross demands. In addition to shaving weight, the body design provides more comfortable knee grip and control feel, with a seat shaped to give the
rider additional room to move aboard the machine.
Enhanced Mass-Centralization
The engine, aluminum muffler and compact fuel tank are positioned close to the machine's center of mass. This layout contributes to centralized mass for a lightweight handling feeling on the track. The wide 55mm footpegs help lower the rider's center of gravity for
enhanced machine balance, control and rider comfort.
270mm Front Brake
A large 270mm front brake disc is the same system fitted to the YZ450F™, and uses an aggressive pad material for exceptional stopping power and braking control. Out back, a durable heat-resistant rear rotor boosts brake durability.
Class-Leading Suspension
Industry-leading, fully adjustable KYB® coil spring-type fork with speed-sensitive damping provides exceptional balance between handling and bump absorption, for race-winning handling performance. The linkage-type rear suspension features a KYB® shock
with revised damping characteristics to match the chassis.
Strong, Lightweight Wheels
Careful computer-aided refinement of each wheel’s cross-sectional profile shaves valuable weight without sacrificing durability.
Adjustable Handlebar Mounts
The 4-position adjustable handlebar mounts are rubber mounted to improve comfort and reduce handlebar vibration, while the alloy handlebar centralize overall mass.
Embedded Graphics
Yamaha’s unique embedded graphics are built into the bodywork for extended durability, resisting both peeling and damage.
Race Winning Details
The YZ250F includes top-spec details, including 1-1/8” aluminum tapered handlebars, wide 55mm footpegs, a quick-adjust clutch perch, stylish blue rims and gold chain.
Simplified Servicing
Sleek air cleaner cover provides tool-less access to the air filter, positioned at the front of the bike to avoid roost from the rear wheel.
