MOTEUR
Arrière-Conception de cylindre incliné
The YZ450FX’s distinct rearward-slanted cylinder design — complete with rear exhaust and forward-mounted intake system — features a cylinder head that works with the frame geometry for optimized weight distribution. Inside, the engine features a straight intake tract, aggressive cam profiles, a high-compression “box bridge” piston design with DLC-coated piston pin and more. Finally, the YZ450FX features specific ECU settings to suit the needs of cross country riders.
Système de démarrage électrique
Le YZ450Le FX est doté d'un système de démarrage électrique compact pour minimiser les délais de redémarrage sur la piste et ajouter de la commodité partout ailleurs. Alimenté par un moteur à haute-capacité et ultra-quatre poids léger-pile au lithium-batterie ionique, le système ajoute un poids minimal.
Application Yamaha Power Tuner
The free of charge and industry-exclusive Yamaha-created Power Tuner app 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.
Cartographie moteur réglable
A handlebar-mounted map switch allows the rider to quickly select between preloaded engine maps — loaded and configured in the Power Tuner app — to account for changing track and weather conditions.
Injection de carburant avancée
The engine breathes through a 44mm Mikuni® throttle body fed by a high pressure electric pump to ensure optimum fuel atomization and power for a wide range of riding conditions.
Transmission et embrayage robustes
The YZF450FX’s wide-ratio 5-speed transmission enhances cross country performance for more flexible gearing selection in open terrain. | 
