14 August. Friday 2026
Yamaha YZ450F Monster Energy - 2021 Specifications and Reviews
The 2021 Yamaha YZ450F Monster Energy is a competitive motocross bike designed for intermediate to advanced riders seeking a potent 449cc four-stroke powerplant. Known for its aggressive power delivery and agile handling, this machine excels in both track racing and off-road environments with its liquid-cooled engine, titanium valves, and responsive fuel injection system.
General information | |
| Category | Cross / motocross |
| Year | 2021 |
| Model | Yamaha YZ450F Monster Energy |
| | |
Engine and Transmission Specifications | |
| Clutch | Multiplate wet clutch |
| Transmission type | Chain (final drive) |
| Gearbox | 5-speed |
| Cooling system | Liquid |
| Lubrication system | Wet sump |
| Ignition | TCI: Transistor Controlled Ignition |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Fuel system | Injection. Mikuni® fuel injection, 44mm |
| Valves per Cylinder | 4 |
| Bore x Stroke | 97.0 x 60.9 mm (3.8 x 2.4 inches) |
| Compression | 13.0:1 |
| Engine details | Titanium-valves |
| Engine type | Single cylinder, four-stroke |
| Capacity: | 449.0 ccm (27.40 cubic inches) |
| | |
Brakes, suspension, Frame and wheels | |
| Seat | Long, two-tone, motocross-style seat |
| Wheels | Dunlop® MX33® tyres |
| Rear brakes | Single disc. Hydraulic. |
| Diameter | 270 mm (10.6 inches) |
| Front brakes | Single disc. Hydraulic. |
| Rear tire | 120/80-19 |
| Front tire | 80/100-21 |
| Rear wheel travel | 318 mm (12.5 inches) |
| Rear Suspension | KYB® single shock; fully adjustable |
| Front wheel travel | 310 mm (12.2 inches) |
| Front Suspension | KYB Speed-Sensitive System, inverted fork: fully adjustable |
| Trail | 119 mm (4.7 inches) |
| Rake (fork angle) | 27.0° |
| Frame type | Bilateral beam frame, aluminum |
Physical measures and capacities | |
| Fuel capacity | 6.06 litres (1.60 US gallons) |
| Wheelbase | 1486 mm (58.5 inches) |
| Ground clearance | 330 mm (13.0 inches) |
| Overall width | 826 mm (32.5 inches) |
| Overall length | 2184 mm (86.0 inches) |
| Overall height | 1275 mm (50.2 inches) |
| Seat height | 965 mm (38.0 inches) If adjustable, lowest setting. |
| Weight incl. oil, gas, etc | 111.1 kg (245.0 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Comments | Special Monster Energy Yamaha Racing Edition. Launch control. Power Tuner via smartphone. |
| Factory warranty | 30 Day Limited Factory Warranty |
| Starter | Electric |
| Color options | Team Yamaha Blue/green |
Performance Profile & Rider Fit
Best For
Track90%
City5%
Cornering85%
Daily Riding10%
Touring5%
Passenger0%
Rider Profile
| Best For | Best suited to experienced off-road or motocross riders comfortable with a tall, aggressive, race-bred machine. |
| Purpose | Built purely for motocross racing and serious off-road riding, not for street use or commuting. |
| Rider Fit | Demands a fit, confident rider due to its tall 965mm seat height, minimal weight at 108.9kg, and hard-charging ergonomics. |
| Character | A razor-sharp, high-revving 450cc single with titanium valves and fully adjustable KYB suspension, designed to be thrown around berms and jumps with total precision. |
| Not Ideal For | Not for beginners, commuters, passengers, or anyone wanting comfort, storage, or highway capability. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
Rider Reviews
Total comments: 1
MotorcycleDB Review
The 2021 Yamaha YZ450F Monster Energy motorcycle is an impressive machine that delivers top-notch performance for motocross enthusiasts. With its powerful 450cc engine, lightweight chassis, and advanced suspension system, this bike offers excellent handling and agility on the track. The Monster Energy graphics give it a sharp and aggressive look, while the high-quality components ensure a smooth and comfortable ride. Whether you're a seasoned rider or a beginner, this Yamaha YZ450F is an excellent choice for anyone looking for a competitive and reliable motocross bike. Overall, the 2021 Yamaha YZ450F Monster Energy motorcycle is a top contender in the motocross market. Its combination of power, agility, and striking design make it a standout choice for riders who want to make a statement on the track. With its high-performance features and durable construction, this bike is sure to impress both casual riders and serious motocross enthusiasts alike. If you're looking for a reliable and competitive motocross machine, the Yamaha YZ450F Monster Energy is definitely worth considering.Add a Comment
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