Yamaha YZ 450F
- Production years
- 2004–2027
- Brand
- Yamaha
Choose model year
1 / 10
Selected year: 2027
Technical specifications
- Engine capacity
- 450 cm³
- Power
- 56 hp (42 kW)
- Wet weight
- 110.2 kg
- Seat height
- 965 mm
Overview
The Yamaha YZ 450F is a motocross bike in the YZ family, with production years spanning 2004–2027. The 2027 model has a 450.0 cm³ single-cylinder, four-stroke engine producing 56 hp (42 kW); it weighs 99.3 kg dry and 110.2 kg wet.
The 965 mm seat height puts the rider high above the ground, while the 345 mm ground clearance helps the bike pass over ruts and obstacles. Fully adjustable KYB suspension with 310 mm of front travel and 315 mm at the rear lets riders tune the setup, and electric starting makes restarting simpler.
Specifications
Engine
Engine
- Bore x stroke
- 97.0 x 60.8 mm
- Engine capacity
- 450 cm³
- Compression ratio
- 13.0:1
- Cooling system
- Liquid
- Engine type
- Single, four-stroke
- Fuel system
- Injection
- Ignition
- TCI
- Lubrication system
- Wet sump
- Oil capacity
- 1 L
- Starting
- Electric
- Valves per cylinder
- 4
Performance and transmission
Performance and transmission
- Power
- 56 hp (42 kW)
- Power weight ratio
- 0.5639 HP/kg (dry)
- Clutch
- Multiplate, wet
- Final drive
- Chain
- Gearbox
- Manual 5-speed
- Transmission type
- Manual
Dimensions and weight
Dimensions and weight
- Dry weight
- 99.3 kg
- Fuel capacity
- 6.1 L
- Ground clearance
- 345 mm
- Overall height
- 1,275 mm
- Overall length
- 2,175 mm
- Overall width
- 830 mm
- Seat height
- 965 mm
- Wet weight
- 110.2 kg
- Wheelbase
- 1,476 mm
Chassis and suspension
Chassis and suspension
- Frame
- Bilateral beam frame, aluminum
- Front suspension
- KYB Speed-Sensitive System, inverted fork: fully adjustable
- Front wheel travel
- 310 mm
- Rake
- 26.9°
- Rear suspension
- KYB® single shock; fully adjustable
- Rear wheel travel
- 315 mm
- Trail
- 122 mm
Brakes and wheels
Brakes and wheels
- Front brakes
- Single disc. Hydraulic.
- Front brakes diameter
- 270 mm
- Front tyre
- 80/100-21
- Rear brakes
- Single disc. Hydraulic.
- Rear brakes diameter
- 245 mm
- Rear tyre
- 120/80-19
Model years
2005
Seat height: 995 mm → 996 mm
2006
Seat height: 996 mm → 998 mm; Fuel capacity: 6.8 L → 7 L
2007
Seat height: 998 mm → 988 mm; Fuel capacity: 7 L → 6.8 L
2008
Power: 45 hp (33 kW) → 56 hp (42 kW)
2010
Wet weight: 108 kg → 111.1 kg; Seat height: 988 mm → 998 mm; Fuel capacity: 6.8 L → 6.1 L
2011
Fuel capacity: 6.1 L → 6.2 L
2012
Seat height: 998 mm → 1,001 mm; Fuel capacity: 6.2 L → 6.1 L
2015
Seat height: 1,001 mm → 975 mm; Fuel capacity: 6.1 L → 7.6 L
2017
Engine capacity: 449 cm³ → 449.7 cm³
2018
Engine capacity: 449.7 cm³ → 449 cm³
2019
Engine capacity: 449 cm³ → 449.7 cm³; Fuel capacity: 7.6 L → 6.1 L
2020
Engine capacity: 449.7 cm³ → 449 cm³; Seat height: 975 mm → 965 mm
2023
Wet weight: 111.1 kg → 108.9 kg
2025
Engine capacity: 449 cm³ → 450 cm³
2026
Wet weight: 108.9 kg → 110.2 kg
| Specification | ||||||
|---|---|---|---|---|---|---|
| Engine capacity | 449 cm³ | 449 cm³ | 449 cm³ | 450 cm³ | 450 cm³ | 450 cm³ |
| Power | 56 hp (42 kW) | 56 hp (42 kW) | 56 hp (42 kW) | 56 hp (42 kW) | 56 hp (42 kW) | 56 hp (42 kW) |
| Wet weight | 111.1 kg | 108.9 kg | 108.9 kg | 108.9 kg | 110.2 kg | 110.2 kg |
| Seat height | 965 mm | 965 mm | 965 mm | 965 mm | 965 mm | 965 mm |
| Fuel capacity | 6.1 L | 6.1 L | 6.1 L | 6.1 L | 6.1 L | 6.1 L |
Pros and cons
Advantages
Electric starting
The starter makes it easier to get going again after a stall.
Adjustable suspension
Fully adjustable front and rear KYB suspension allows the setup to be tuned for different track conditions.
High ground clearance
The 345 mm clearance helps the bike clear ruts and other track obstacles.
Things to consider
Tall seat
At 965 mm, the seat can make it harder for shorter riders to put a foot down.
Limited fuel carried
The 6.10-liter tank leaves less fuel aboard between refills than a larger-capacity tank would.
Rider fit
Rider fit calculator
Calculated in your browser
Don't know it? Leave this empty and we'll estimate it from your height.
Estimated from your height: 79 cm
How to measure
Stand barefoot with your back to a wall. Hold a book firmly between your legs, then measure from the floor to the top edge of the book.
Estimated ground reach
Ground reach may be difficult
This seat may feel tall. A lower seat or suspension setup could make stops easier.
Seat height
965 mm
Approx. loaded height
935 mm
Estimate assumes about 30 mm of suspension sag. Seat width, footwear, luggage and suspension settings can change real reach. Always sit on the motorcycle before buying.
Fuel range calculator
Enter your expected fuel consumption to estimate the distance on a full tank, with or without a fuel reserve.
Tank 6.1 L at 6 L/100 km
Lower consumption = longer range.
Estimated range
102 km
With 10% reserve
92 km
This is a planning estimate, not a measured result. Speed, route, weather, load and riding style can change real consumption.
FAQ
How much power does the 2027 Yamaha YZ 450F make?
It produces 56 hp (42 kW).
What engine does the 2027 Yamaha YZ 450F have?
It has a 450.0 cm³, single-cylinder, four-stroke engine with fuel injection and liquid cooling.
How tall is the 2027 Yamaha YZ 450F seat?
The seat height is 965 mm.
How much fuel does the 2027 Yamaha YZ 450F hold?
Its fuel capacity is 6.10 liters.
