The new YZ250F 2021 Yamaha Motocross is designed for racing and winning like a champion, with a higher-performance engine, a redesigned lightweight chassis, and more.
YZ250F 2021 Yamaha Motocross – Features and Price
Top Features
With race-winning features never seen before in the 250cc class, the YZ250FTM is poised to dominate the competition.
The GYTR® Power Tuner’s versatility and precise tunability are now available on your smartphone, thanks to Yamaha’s free and industry-leading Power Tuner app. For maximum track-side tweaking, make immediate fuelling and ignition timing modifications and upload them to the bike.
The YZ250F 2021 Yamaha Motocross uses a small starter motor and an ultra-lightweight lithium battery to bring the ease of push-button starting to the racetrack, allowing for effortless restarts when the time is ticking and relaxing riding when the clock isn’t ticking.
Yamaha’s inverted cylinder head architecture, which includes a high-spec piston, aggressive cam profiles, cylinder geometry, and more, aims to provide YZ250F riders the most pleasing combination of high-rpm power with a broad, usable powerband.
The primary spars, engine mounts, and mounting location on Yamaha’s bilateral beam frame are intended to concentrate mass and give an optimum combination of cornering sensation and straight-line stiffness.
Yamaha’s spring-type forks offer industry-leading suspension performance right out of the box, thanks to precise, speed-sensitive damping.
Engine Features
A new forward-positioned straight downdraft intake with symmetrical intake and exhaust ports is featured on the liquid-cooled DOHC 4-valve fuel-injected engine. The engine has been upgraded for YZ250F 2021 Yamaha Motocross with a new cylinder head and a new air intake system, a better intake port shape, a new exhaust camshaft profile, and an updated ECU. They all provide a greater mid-to-top-end power and higher peak power while maintaining its class-leading low-end torque.
The Yamaha Power Tuner app delivers the power of the GYTR Power Tuner to your iOS® or Android® smartphone for free, and it’s the only one in the business. The app enables the owners to adjust air/fuel mixture and ignition timing maps to tune engine performance for track conditions and record race log information. In addition, it monitors a variety of data such as maintenance and system diagnosis, engine run time, and more using wireless connectivity to communicate with the bike’s onboard CAN-bus network.
The YZ250F 2021 Yamaha Motocross’s two-mode changeable engine mapping enables the rider to change the engine character at the touch of a button, making it simple to tailor the bike for different tracks or weather conditions.
The YZ250F 2021 Yamaha Motocross comes with a small electric starting system that reduces restart times on the track and provides convenience in other areas. The system is powered by a four-cell lithium-ion battery with a high capacity and ultra-lightweight design.
The bridge-box shape of a flat-top forged piston adds strength while reducing weight. Together with the piston, rings, and DLC-coated piston pin, the offset cylinder design contributes to low friction loss and fast response. The intake ports, cam profiles, high-strength connecting rod, and tuned crank and counterbalancer all work together to offer mighty high-rpm power with user-friendly delivery and outstanding dependability.
A 44mm throttle body supplied by a high-pressure electric fuel pump injects fuel via a 12-hole Denso® injector is used in the adjustable fuel injection system. It provides optimal fuel atomization and air/fuel calibration, resulting in outstanding rideability in various riding situations.
The mass centralization and power development characteristics are improved via a novel exhaust pipe design. The muffler is closer to the bike’s center of mass thanks to this arrangement, which pushes the exhaust pipe’s back end forward.
The new transmission gears and shift mechanisms are all intended to make gear shifts as smooth as possible while also increasing longevity under the harsh conditions of motocross racing. A large-diameter clutch is also used on the YZ250F to improve dependability even further in high-heat situations.
Chassis/Suspension
The small frame of the YZ250F 2021 Yamaha Motocross refines the intuitive handling that makes this Yamaha one of the finest handling bikes in the class. The stiffness and endurance of the top frame are improved by the prominent upper frame bracing. The YZ250F-specific engine mounts and larger rear frame spars help balance mass for the most excellent possible combination of bump absorption, rigidity, and grip.
The YZ250F 2021 Yamaha Motocross has a compact body from head to tail, including a small fuel tank intended especially for motocross use. The body design offers a more comfortable knee grip and control sensation and a seat designed to allow the rider more space to maneuver onboard the bike and reduce weight.
The engine, aluminum muffler, and small gasoline tank are all near to the center of mass of the motorcycle. This configuration promotes a concentrated group for a light handling sensation on the track. The wide 55mm footpegs assist in lowering the rider’s center of gravity, which improves machine balance, control, and comfort.
The YZ450FTM utilizes the same big 270mm front brake disc and aggressive pad composition as the YZ450FTM for excellent stopping power and braking control. Brake durability is improved with a heat-resistant rear rotor.
The fully adjustable KYB® coil spring-type fork with speed-sensitive damping is the industry leader in handling and bump absorption, resulting in race-winning handling performance. A KYB® shock with altered damping characteristics to fit the chassis is used in the linkage-type rear suspension.
Each wheel’s cross-sectional shape is meticulously computer-aided refined to save weight without compromising durability.
Additional Features
The rubber-mounted 4-position adjustable handlebar mounts enhance comfort and minimize handlebar vibration, while the aluminum handlebar helps balance total mass.
Yamaha’s embedded graphics are made into the bodywork for long-term durability and resistance to peeling and damage.
The YZ250F 2021 Yamaha Motocross comes with 1-1/8″ aluminum tapered handlebars, broad 55mm footpegs, quick-adjusted clutch perch, attractive blue rims, and gold chain as standard equipment.
The air filter is located at the front of the bike to prevent roost from the back tire and is accessible without tools.
New for 2021
The YZ250F 2021 Yamaha Motocross’s already powerful engine received a slew of upgrades, including a brand-new cylinder head including an improved intake port shape. The new exhaust camshaft profile, a new silencer, and an updated ECU produce more mid-to-top-end power and increased peak power while maintaining its class-leading low-end torque.
With a new and better high flow air filter, air cleaner boot with a new form for improved flow, and a bigger diameter throttle body joint, additional airbox lid intake ducts have been installed for increased airflow.
The all-new flex characteristics of the YZ250F 2021 Yamaha Motocross aluminum frame provide riders with the optimum mix of precise cornering performance and handling stability. The 2021 YZ250F raises rider confidence to new heights by fine-tuning the chassis rigidity balance with modifications to the lateral beams and engine cradle tube thickness and the engine mounts, triple top clamp front axle.
The front and rear dampers on the YZ250F 2021 Yamaha Motocross have been changed to work in tandem with the new chassis to enhance cornering performance, traction, and bump absorption. The rider can use the engine’s tremendous power with more confidence thanks to smoother chassis movement.
A new, more robust front caliper and compact rear caliper work in tandem with new pads and discs to improve brake feel and controllability. A further 240mm rear brake rotor conducts heat more effectively for more consistent racing performance.
The crankcase, cam chain and tensioner, water pump, clutch basket, and third, fourth, and fifth transmission gears have improved overall longevity better than 2020 Yamaha YZ250F Dirt Motorcycle.
YZ250F 2021 Yamaha Motocross – Price
The new YZ250F 2021 Yamaha Motocross is available at the price of $8,299 only in the Team Yamaha Blue color option.
YZ250F 2021 Yamaha Motocross – Technical Specifications
Engine
| Engine Type | 250cc liquid-cooled DOHC 4-stroke; 4 valves |
| Bore x Stroke | 77.0mm × 53.6mm |
| Compression Ratio | 13.8:1 |
| Fuel Delivery | Mikuni® fuel injection, 44mm |
| Transmission | Constant-mesh 5-speed; multi-plate wet clutch |
| Final Drive | Chain |
Chassis
| Suspension / Front | KYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2-in travel |
| Suspension / Rear | KYB® single shock; fully adjustable, 12.5-in travel |
| Brakes / Front | Hydraulic disc, 270mm |
| Brakes / Rear | Hydraulic disc, 240mm |
| Tires / Front | 80/100-21 Bridgestone® Battlecross® X20F |
| Tires / Rear | 100/90-19 Bridgestone® Battlecross® X20R |
Dimensions
| L x W x H | 85.6 inches x 32.5 inches x 50.6 inches |
| Seat Height | 38.2 inches |
| Wheelbase | 58.1 inches |
| Rake (Caster Angle) | 26° |
| Trail | 4.7 inches |
| Maximum Ground Clearance | 13.2 inches |
| Fuel Capacity | 1.6 gallons |
| Wet Weight | 234 lb |
Other
| Warranty | 30 Day (Limited Factory Warranty) |
Conclusion
The new YZ250F 2021 Yamaha Motocross is an impressive dirt bike that has a highly fuel-efficient engine. The overall compact chassis and style bodywork attract others, while the suspension and braking system provides a good response on rough surfaces.
