Yamaha YZ 450 F 2018


2018 allows the Yamaha YZ 450 F to offer a big evolution. The transplant of an electric start to start, then we move on to serious things. This is equipped with a smartphone tuning application, a world first on a production motocross. This completely redesigned MXGP machine features a new reverse cylinder head engine that allows Yamaha riders to reach their full potential.

With state-of-the-art technology, exceptional engine power and agile chassis, the new YZ 450 F creates an even closer bond between motocross riders and their machine. A guaranteed success for Yamaha riders when the motorcycles go on sale in August. 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 new kind 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 have been improved, among other modifications. Everything works in unison to deliver exceptional power and increased control. In addition, thanks to the new aluminum bilateral beam frame, 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

Today, Yamaha is also taking the opportunity to launch the Power Tuner application for smartphones, specially designed by Yamaha for iOS and Android systems. The 2018 YZ 450 F then becomes the first production motocross to be equipped with a wireless engine tuning device for smartphones. From now on, all Yamaha YZ 450 F riders can be in harmony with their motorcycle and adjust the performance of their engine according to their riding style, track conditions and 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 on-board 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 new Power Tuner application installed on the YZ 450 F 2018 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 2018 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.

A new engine

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

The new cylinder head is lighter and the engine is slightly vertical in the new frame, to optimize weight distribution. The new engine features new cam profiles, as well as a new crankshaft and a more robust high compression piston with a DLC spindle; it now breathes through a Mikuni 44mm throttle body. All these improvements help to combine 450cc power, exceptional 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 new YZ 450 F engine for faster and smoother starts at the start line. By improving control during power starts, the LCS system guarantees the pilot exceptional performance..

Engine and electronics of the YZ 450 F 2018 – Main technical changes

– New high performance reverse cylinder head engine
– New lightweight cylinder head
– New cam and crankshaft profiles
– Power Tuner with new wireless smartphone app
– New lightweight electric starter with lithium-ion battery
– New vertical position of the motor in the frame
– Stronger high compression piston with DLC pin
– 44mm Mikuni throttle body
– Enlarged radiators
– Central position of the silencer

New aluminum frame and optimized ergonomics

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

The completely redesigned chassis of the 2018 YZ 450 F is surrounded by a lighter and more compact body which not only improves aerodynamics but also ergonomics..

The gasoline tank capacity was reduced to 6.2 liters, the airbox was redesigned and new concave radiator covers were installed. All of this helps to reduce the knee contact area, improve styling, increase knee grip, and improve overall ride support. Finally, the width of the saddle has been reduced by 9mm and its height has been reduced by almost 20mm at the rear, resulting in a flattened profile which improves the mobility of the body when shifting the weight from the front. rearward.

Unparalleled KYB suspension

The fully adjustable KYB coilover fork features speed-sensitive shocks, which strike 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 like the new chassis. It is now 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..

New graphics and blue rims

The sleek new body features new graphics. In addition, the new YZ 450 F 2018 is fitted with blue rims that recall its origins as a production motorcycle..

Chassis and ergonomics of the YZ 450 F 2018 – Main technical changes

– New ultra-rigid bilateral beam frame
– New engine mounts for better weight centering
– Narrower, flattened saddle for improved maneuverability
– Slimmer and more compact body
– Optimized suspension like the new frame
– Redesigned KYB rear shock with larger reservoir
– Compact 6.2 liter fuel tank
– New graphics and blue rims

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      YZ 450 F 2017
      YZ 450 F 2017

      Model marketed in


      The technical aspect

      Yamaha YZ 450 F 2018

      • 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 2018 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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