14 August. Friday 2026
Yamaha YZ450FSP - 2021 Specifications and Reviews
The 2021 Yamaha YZ450FSP is a competition-focused motocross machine built for serious amateur and professional riders seeking maximum performance. Powered by a 449cc liquid-cooled four-stroke engine with titanium valves and aggressive 13.0:1 compression, it delivers strong power delivery across the rev range. Known for its responsive handling and reliable Mikuni fuel injection, this bike excels in both amateur racing and training environments.
2021
General information | |
| Category | Cross / motocross |
| Year | 2021 |
| Model | Yamaha YZ450FSP |
| | |
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 | 317 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 | 6.20 litres (1.64 US gallons) |
| Wheelbase | 1481 mm (58.3 inches) |
| Ground clearance | 330 mm (13.0 inches) |
| Overall width | 825 mm (32.5 inches) |
| Overall length | 2185 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 | 111.0 kg (244.7 pounds) |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Starter | Electric |
| Color options | Monster Energy Yamaha Racing Edition |
Performance Profile & Rider Fit
Best For
Track90%
City5%
Cornering85%
Daily Riding5%
Touring5%
Passenger0%
Rider Profile
| Best For | This is a full-factory-spec, race-only motocross machine best suited to experienced or professional-level riders comfortable with a stiff, high-strung competition bike. |
| Purpose | Built purely for closed-course motocross racing at the highest level, not for general riding. |
| Rider Fit | Demands strong physical fitness, a tall seat height, and confident body positioning, as there is no seat comfort or low-speed forgiveness built in. |
| Character | Aggressive, razor-sharp, and race-tuned, with explosive throttle response and suspension designed for jumps and rough terrain rather than smoothness. |
| Not Ideal For | Not suitable for commuting, road riding, touring, carrying a passenger, or riders seeking comfort and low-maintenance ownership. |
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 YZ450FSP is an impressive off-road motorcycle that delivers exceptional performance and handling. With its powerful 450cc engine and advanced suspension system, this bike offers a thrilling riding experience for enthusiasts. The lightweight design and ergonomic layout make it easy to maneuver through various terrains, while the responsive throttle ensures smooth acceleration and precise control. Whether you're a seasoned rider or a beginner looking to tackle challenging trails, the YZ450FSP is a top choice for anyone seeking a reliable and capable off-road machine. In addition to its impressive performance, the 2021 Yamaha YZ450FSP boasts a sleek and modern design that is sure to turn heads on the trails. The stylish bodywork and aggressive color scheme give this bike a bold and athletic appearance, while the durable construction and high-quality components ensure long-lasting reliability. With its cutting-edge technology and attention to detail, the YZ450FSP is a standout option in the competitive off-road motorcycle market. If you're in the market for a high-performance off-road bike that offers an exhilarating ride and eye-catching aesthetics, the 2021 Yamaha YZ450FSP is definitely worth considering.Add a Comment
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