2017 Yamaha YZ450F YZ

2017 Yamaha YZ450F

The 2017 Yamaha YZ450F was a motocross motorcycle that largely carried over the design and features from its 2016 predecessor. It was part of a generation of YZ450F models that featured Yamaha's distinctive "reverse cylinder head" engine layout, where the intake was positioned at the front and the exhaust at the rear, aiming for better mass centralization and a straighter intake tract for improved power delivery.

Key Features and Specifications:

Engine:
449cc liquid-cooled, DOHC, four-stroke engine with four titanium valves. It was known for its strong, yet controllable powerband, with a significant punch in the mid-range and top end.

Fueling:
Yamaha Fuel Injection (YFI) with a Keihin 44mm throttle body.

Suspension:
A standout feature was its highly regarded Kayaba (KYB) Speed-Sensitive System (SSS) spring forks and KYB monoshock rear suspension. Many considered these to be among the best stock suspension components in the motocross class for their balance, bump absorption, and ease of adjustment.

Chassis:
It utilized an aluminum bilateral-beam frame, designed for a balance of agility and straight-line stability.

Technology:
The 2017 model included Yamaha's Launch Control System (LCS) for optimized starts and was compatible with the accessory GYTR Power Tuner, allowing riders to easily adjust engine mapping for different track conditions and riding styles.
Minor Updates for 2017: While largely unchanged from 2016, the 2017 YZ450F received minor updates such as new Dunlop MX3S soft/intermediate terrain tires (replacing the MX52s), an updated rear brake rotor material for improved durability and feel, and a redesigned airbox cover for easier access to the Dzus fasteners.

Riding Experience:

Reviewers generally praised the 2017 YZ450F for its powerful engine, class-leading KYB suspension, and overall durability. It was described as a machine that performs exceptionally well, particularly for intermediate to professional riders who could fully utilize its strong top-end power. While it offered excellent straight-line stability, some riders found its handling in tight corners to require a bit more effort due to its somewhat wide feel and a tendency to push. Despite these minor critiques, the 2017 YZ450F remained a competitive and respected choice in the 450cc motocross segment, building on Yamaha's reputation for robust and well-suspended dirt bikes.

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