Key performance
Technical specifications
No spec differences between these two model years.
Engine
- Displacement
- 450 cc
- Power
- 55.0 ch (40.5 kW)
- Engine type
- Monocylindre, 4 temps
- Cooling
- liquide
- Compression ratio
- 12.8 : 1
- Bore × stroke
- 97 x 60.8 mm
- Valves/cylinder
- 4
- Camshafts
- 2 ACT
- Fuel system
- Injection Ø 44 mm
Chassis
- Frame
- Semi double berceau en alu
- Gearbox
- boîte à 5 rapports
- Final drive
- Chaîne
- Front suspension
- Fourche téléhydraulique inversée Ø nc, déb : 310 mm
- Rear suspension
- Mono-amortisseur, déb : 317 mm
Brakes
- Front brakes
- Freinage 1 disque Ø 270 mm, étrier 2 pistons
- Rear brakes
- Freinage 1 disque Ø 245 mm, étrier simple piston
- Front tyre
- 80/100-21
- Rear tyre
- 110/90-19
Dimensions
- Seat height
- 965.00 mm
- Fuel capacity
- 6.20 L
- Weight
- 112.00 kg
- New price
- 9 199 €
Overview
Imagine a motocross rider, at the edge of the track, scrutinizing his machine. This isn't just a motorcycle; it's a racing computer on two wheels. In 2018, Yamaha threw a stone into the pond with this YZ 450 F, and it's not just for the electric starter, a welcome concession to modernity. The revolution lies elsewhere, in your smartphone. This motorcycle was the first production model to incorporate a dedicated tuning application, a tool that transforms the rider into an engineer at the trackside. We're talking about a MXGP machine filtered for the public, but whose DNA remains wild.

The heart of the beast, this 449.7 cm3 single-cylinder engine, has been profoundly reshaped. Yamaha played with the geometry, inclining the engine block more vertically within the new aluminum frame to seek optimal balance. With an inverted cylinder head, a high-compression piston, and a 44 mm Mikuni throttle body, the objective is clear: to offer exploitable power, not just brutal power. The 55 horsepower are there, but the real subject is how to distribute them. The transmission and clutch have been reinforced to withstand abuse, while the Launch Control System (LCS) aims to transform every starting line into an advantage. For a motorcycle of this caliber, its wet weight of 112 kg is a significant argument, literally, in the technical sections.
Where competitors, such as KTM or Husqvarna, focus on pure aggression, the 2018 YZ 450 F offers a more technocratic approach. Its redesigned bilateral frame seeks the perfect compromise between straight-line rigidity and flexibility in corners. The bodywork has been reworked for better ergonomics, with a lowered seat and a reduced 6.2-liter fuel tank to facilitate rider movement. The KYB suspension, a benchmark in the market, remains unchanged in principle but has been recalibrated for this new chassis, guaranteeing behavior that is both precise and absorbent.

The target audience is obvious: the serious motocross rider, who spends time on circuits and values fine-tuning capabilities. A beginner will be overwhelmed by the power and complexity of the settings. The price, around 9200 euros at the time, positioned this Yamaha at the top of the range, a justified investment for those who exploit all its tools. Compared to a 2020 YZ 450 F or more recent models, this 2018 version remains the pioneer of this connected philosophy. If you're looking for a ready-to-ride, simple, and raw cross motorcycle, this Yamaha might not be your first choice. But if you see the track as a laboratory and your motorcycle as an instrument to be configured, it offers a unique field of experimentation.

Its potential drawback? This sophistication can sometimes feel like overcomplexity for a sport that relies on instinct and physical reaction. The application, a brilliant concept, can also distract from the essentials: riding and feeling the motorcycle. But true to Yamaha, this 2018 YZ 450 F has proven that digital innovation can find its place even in the brutal environment of motocross. It's not just a motorcycle; it's a system, and for some, that's exactly what they're looking for.
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