Key performance

55 ch
Power
🔧
450 cc
Displacement
⚖️
112 kg
Weight
💺
965 mm
Seat height
6.2 L
Fuel capacity
💰
9 199 €
New price
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Technical specifications

Changements 2006 2018
Displacement
449 cc 450 cc
Power
55.0 ch (40.5 kW)
Engine type
Single cylinder, four-stroke Monocylindre, 4 temps
Cooling
Liquid liquide
Compression ratio
12.3:1 12.8 : 1
Bore × stroke
95.0 x 63.4 mm (3.7 x 2.5 inches) 97 x 60.8 mm
Valves/cylinder
4
Camshafts
2 ACT
Fuel system
Carburettor. Keihin FCR37H Injection Ø 44 mm
Valve timing
Double Overhead Cams/Twin Cam (DOHC)
Lubrication
Dry sump
Ignition
CDI
Starter
Kick
Frame
Semi double berceau en alu
Gearbox
5-speed boîte à 5 rapports
Final drive
Chain   (final drive) Chaîne
Clutch
Wet, multiple-disc
Front suspension
Upside-down telescopic fork Fourche téléhydraulique inversée Ø nc, déb : 310 mm
Rear suspension
Swingarm (linked type monocross) Mono-amortisseur, déb : 317 mm
Front wheel travel
300 mm (11.8 inches)
Rear wheel travel
125 mm (4.9 inches)
Front brakes
Single disc Freinage 1 disque Ø 270 mm, étrier 2 pistons
Rear brakes
Single disc Freinage 1 disque Ø 245 mm, étrier simple piston
Front tyre
80/90-R21 80/100-21
Rear tyre
110/90-19 110/90-19
Seat height
998.00 mm 965.00 mm
Wheelbase
1495.00 mm
Ground clearance
373.00 mm
Length
2197.00 mm
Width
815.00 mm
Height
1300.00 mm
Fuel capacity
7.00 L 6.20 L
Weight
112.00 kg
Dry weight
99.80 kg
New price
9 199 €

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.

Yamaha YZ 450 F

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.

Yamaha YZ 450 F

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.

Yamaha YZ 450 F

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.

Indicators & positioning

Weight-to-power ratio
0.48 ch/kg
🔧
Volumetric power
120.5 ch/L
In category Cross / motocross · 225-899cc displacement (383 motorcycles compared)
Power 54 ch Top 32%
17 ch median 47 ch 63 ch
Weight 112 kg Lighter than 33%
103 kg median 109 kg 132 kg
P/W ratio 0.48 ch/kg Top 27%
0.13 median 0.46 0.58 ch/kg

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