14 August. Friday 2026
Yamaha YZ450F - 2021 Specifications and Reviews
The 2021 Yamaha YZ450F is a high-performance motocross bike engineered for competitive riders seeking class-leading power and precision. Its potent 449cc four-stroke engine with titanium valves and advanced fuel injection delivers aggressive acceleration and reliable top-end performance on demanding tracks. The YZ450F is renowned for its exceptional handling, lightweight construction, and winning heritage in professional motocross racing.
General information | |
| Category | Cross / motocross |
| Year | 2021 |
| Model | Yamaha YZ450F |
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 | Launch control. Power Tuner via smartphone. |
| Factory warranty | 30 Day Limited Factory Warranty |
| Starter | Electric |
| Color options | Team Yamaha Blue |
Performance Profile & Rider Fit
Best For
Track90%
City10%
Cornering88%
Daily Riding10%
Touring10%
Passenger5%
Rider Profile
| Best For | This is a full-size open-class motocross weapon best suited to intermediate through expert riders comfortable with aggressive power delivery and a tall, firm chassis. |
| Purpose | Built purely for motocross racing and hard off-road riding, excelling on tracks and rough terrain rather than street use. |
| Rider Fit | Its 38-inch seat height, lightweight 243 lb wet weight, and race-oriented ergonomics demand good rider fitness, leg length, and standing-riding technique. |
| Character | Sharp, high-revving, and razor-responsive, it rewards committed, active riding with explosive acceleration and precise cornering manners. |
| Not Ideal For | It is not suited for commuting, touring, passengers, or casual low-speed street riding due to its lack of lights, mirrors, and road-going comfort features. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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Rider Reviews
Total comments: 1
MotorcycleDB Review
The 2021 Yamaha YZ450F motorcycle is a game-changer in the world of motocross bikes. With its powerful 449cc engine, advanced suspension system, and lightweight design, this bike is built to dominate the track. The electric start and precise handling make it easy for riders to maintain control and push the limits of their performance. Whether you're a seasoned racer or a weekend warrior, the YZ450F offers an exhilarating ride that will leave you craving more. In addition to its impressive performance features, the 2021 Yamaha YZ450F motorcycle also boasts a sleek and modern design that is sure to turn heads. The bold graphics and aggressive styling make a statement on the track, while the ergonomic layout ensures a comfortable and confident ride. With its cutting-edge technology and innovative engineering, the YZ450F sets a new standard for motocross bikes in 2021. If you're looking for a bike that delivers top-tier performance and unmatched style, the 2021 Yamaha YZ450F is the perfect choice.Add a Comment
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