2019 Yamaha YZ 450 F


Following its major redesign for 2018, Yamaha’s big cross benefits from several detailed technical improvements for 2019. The most significant change has been made to the front, where the fork is now fitted with a larger diameter axle and modified shape struts that ensure greater rigidity of the front.
This improves the overall handling of the YZ 450 F by providing more precise grip on the ground and allowing the pilot to better assess the feel of the nose gear..

Thus, in 2018, this YZ-F underwent a big evolution. The transplant of an electric starter to start, then we move on to serious things. It is equipped with a smartphone tuning application, a world first on a production motocross. This completely redesigned MXGP machine is equipped with a reverse cylinder head engine that allows Yamaha riders to reach their full potential.

Thanks to its ultramodern technology, the formidable power of its engine and the agility of the chassis, the YZ 450 F creates an even closer bond between motocross riders and their machine. This MXGP-inspired motocross marks a new era of advanced racing technology, where the rider is in perfect harmony with his bike and where adjustments on the track are made quickly and easily from the touchscreen of a smartphone..

The perfect marriage of power and confidence.

Yamaha designers have focused on building a type of motocross that perfectly combines power and confidence, while providing Yamaha riders with unmatched style, performance and handling..

The cylinder head, piston, cam profiles and cylinder geometry of the engine were improved, among other modifications. It all works in unison to deliver premier power and increased control. In addition, thanks to the aluminum frame with bilateral beam, the engine is ideally positioned to optimize the balance of the bike, while increasing the feeling in the turns and the overall rigidity..

World’s first standard Power Tuner app

Yamaha also took the opportunity to launch the Power Tuner application for smartphones, specially designed by Yamaha for iOS and Android systems. The YZ 450 F then became the first production motocross to feature a wireless engine tuning device for smartphones. From now on, all the pilots of this Yam can be in symbiosis with their motorcycle and adjust the performance of their engine according to their driving style, the track conditions and the weather conditions..

Yamaha’s Power Tuner app allows the rider to quickly change the fuel injection and ignition mapping. Indeed, the modifications are downloaded wirelessly to the motorcycle, thanks to the onboard Wi-Fi system of the communication box. A logging function allows you to take notes on location and driving conditions, motorcycle settings, etc., for future reference. In addition, this revolutionary application can also monitor a set of data, including stroke settings, system maintenance and diagnostics, engine runtime..

The Power Tuner application installed on the YZ 450 F does not only allow detailed modification of the engine mapping. It also allows users to share settings within a team or group of friends, providing a unique tool that facilitates communication and improves performance for Yamaha riders..

Compact and lightweight electric starter

Thanks to the YZ 450 F’s compact starter and ultra-light lithium-ion battery, push-button starting makes its entry into the world of racing, for effortless restarts under pressure. Also ideal for relaxed driving. Powered by an ultra-light, high-capacity lithium-ion battery, the system adds minimal weight.

the motor

For 2018, Yamaha had revamped the YZ 450 F’s distinctive rear-tilted single-cylinder design, characterized by a rear-facing exhaust and a front-mounted drop-down intake system..

The cylinder head is lighter and the engine is slightly vertical in the frame, to optimize weight distribution. This single cylinder was fitted with new cam profiles, as well as a new crankshaft and a more robust high compression piston with a DLC spindle; it breathes through a Mikuni 44mm throttle body. All of these improvements help to combine 450cc power with excellent control and response..

The transmission and clutch have been restructured for a more direct connection and increased robustness. The surface of the gears has been enlarged, the clutch discs have been improved and the outer pressure plate has been hardened for greater durability..

To improve performance and weight distribution, the radiators of the YZ 450 F have been widened and aimed directly at the incoming air stream to improve cooling in the most difficult racing conditions. The innovative design of the “wraparound” tailpipe improves weight centering and power build-up. In addition, its geometry has been redesigned for 2018. In this configuration, the rear of the exhaust pipe has been brought forward and the silencer has been brought closer to the center of mass..

For the 2018 model, Yamaha’s Start Control System (LCS) has been integrated into the YZ 450 F’s engine for faster and smoother starts at the start line. By improving control during power starts, the LCS system guarantees the pilot exceptional performance..

VSaluminum frame and optimized ergonomics

The YZ 450 F features a compact bilateral beam frame that enhances the legendary handling of this motocross. The refined upper frame spacer increases stiffness, while reshaped rear spars and engine mounts improve mass centering, for the perfect balance of cornering feel and straight-line stiffness. In other words, the frame is designed to perfectly combine shock absorption, stiffness and handling when cornering..

The completely redesigned chassis of the YZ 450 F is surrounded by a lighter and more compact body which not only improves aerodynamics but also ergonomics..

The gasoline tank capacity is 6.2 liters, the airbox has been redesigned and concave radiator covers are installed. All of this helps to reduce the knee support area, improve styling, increase knee grip, and improve overall ride support. Finally, the width of the saddle offers a flattened profile which improves the mobility of the body when moving the weight from front to back..

Unparalleled KYB suspension

The fully adjustable KYB coilover fork features speed-sensitive shocks, which provide an exceptional balance of handling and shock absorption, for champion-quality performance. Its AOS (air / oil separated) design is widely regarded as one of the best systems on the market; it provides excellent road holding at low speed and great stability at high speed, while also offering the advantage of being easy to ride.

The KYB rear shock absorber has been improved just like the chassis. It is equipped with a lighter spring which reduces the weight. In addition, to ensure constant damping during long distance races, the tank capacity has been increased by 30 cm3..

What you must remember





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      YZ 450 F 2018
      YZ 450 F 2018

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      The technical aspect

      2019 Yamaha YZ 450 F

      • Frame
      • Frame: Semi double aluminum cradle
      • Tank: 6.2 liters
      • Seat height: 965 mm
      • Length: 2185 mm
      • Width: 825 mm
      • Height: 1,285 mm
      • Wheelbase: 1,485 mm
      • Weight in running order: 112 kg
      • Train before
      • Telehydraulic inverted fork Ø nc, deb: 310 mm
      • 1 disc Ø 270 mm, 2 piston caliper
      • Front wheel:

        – 21

      Yamaha YZ 450 F 2019 technical

      • Transmission
      • 5-speed gearbox
      • Secondary chain transmission
      • Rear axle
      • Mono-shock, deb: 317 mm
      • 1 disc Ø 245 mm, 1 piston caliper
      • Rear wheel:

        – 19

      • Motor
      • Single cylinder
        in line
        , 4 stroke
      • Cooling: by water
      • Injection Ø 44 mm
      • 2 ACT
      • 4 valves
      • 449.70 cc
        (97 x 60.8 mm)
      • ≈ 55
      • Compression: 12.8: 1
      • Crit’air:

      Detached pieces


      chain kit


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