Key performance
Technical specifications
- Fuel system
- Injection ø 44 mm → Injection
- Frame
- Périmétrique en aluminium → Semi double berceau en alu
- Seat height
- 999.00 mm → 965.00 mm
- Fuel capacity
- 6.20 L → 7.50 L
- New price
- 7 999 € → 8 399 €
Engine
- Displacement
- 450 cc
- Engine type
- Monocylindre, 4 temps
- Cooling
- liquide
- Compression ratio
- 12.5 : 1
- Bore × stroke
- 97 x 60.8 mm
- Valves/cylinder
- 4
- Camshafts
- 2 ACT
- Fuel system
- Injection
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 : 310 mm
Brakes
- Front brakes
- Freinage 1 disque Ø 250 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
- 7.50 L
- Weight
- 111.00 kg
- New price
- 8 399 €
Overview
Can a motocross bike truly improve year after year when it already starts from such a high level? The Yamaha YZ 450 F of 2015 provides a convincing answer, not through a revolution, but through a series of refinements aimed at making it more efficient and easier to live with. In 2014, it had already torn up the track, lining up podiums in MXGP. For this new season, Yamaha engineers have reworked the fuel injection and ignition. The goal? Even more linear and controllable power, a large 449 cm3 single-cylinder that won’t let you down at the slightest wrist error. That's the art of taming a beast of nearly 60 horsepower to make it more accessible, without taking away its ferocity.

The work on ergonomics and maintenance is just as telling. The throttle control is lighter, a detail that changes everything on a track lap when fatigue begins to set in. And let's talk about the air filter, with its quick-release fasteners replacing traditional bolts. In the middle of a race, with muddy hands, you’ll thank the engineers for this attention. These modifications, coupled with new engine mounting brackets, make this Yamaha YZ 450 F a more consistent machine, designed for the rider who chains sessions together.
Visually, the message is clear: it wants to look like the factory beast. The new black rims and "Factory Racing" livery are not there just to look pretty. They announce a philosophy, that of a race bike ready to go. With a declared weight of 111 kilograms fully fueled and a seat height of 965 mm, it asserts its champion's physique. It's a weapon, sharp, that will not suit a beginner but that offers the experienced rider an exceptional work platform. Faced with a KTM 450 SX-F or a Honda CRF450R, it relies on regularity and ease of adjustment rather than pure madness.

So, what is it worth on the used market today? Count around 8400 euros for a new Yamaha YZ 450 F 2015 at the time, a price that already positioned the machine in the top tier. Prices evolve, and if you are looking for a more recent version like a Yamaha YZ 450 F 2020 or even a 2024, the budget will logically increase. But this 2015 edition remains an interesting milestone, a machine where Yamaha has refined a solid base. It's the kind of motorcycle on which you add an Akrapovic exhaust for the sound signature, but whose heart already beats strongly in its original state. A pure competition tool, refined for those who aim for consistency at the top.
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