| General |
| Comments | Model id: CRF450R | Launch control. Power Tuner via smartphone. |
| Colours | Red | Team Yamaha Blue |
| Warranty | - | 30 Day Limited Factory Warranty |
| Dimensions |
| Ground Clearance (in.) | 13.2 inches | 13.0 inches |
| Ground Clearance (mm) | 335 mm | 330 mm |
| Seat Height | 965 mm / 38.0 in. | 965 mm / 38.0 in. |
| Wheelbase | 1481 mm / 58.3 in. | 1486 mm / 58.5 in. |
| Height | 1271 mm / 50.0 in. | 1285 mm / 50.6 in. |
| Length | 2191 mm / 86.3 in. | 2184 mm / 86.0 in. |
| Width | 827 mm / 32.6 in. | 826 mm / 32.5 in. |
| Weights & Capacities |
| Oil Capacity (Quarts) | 1.9 US quarts | 1.06 US quarts |
| Oil Capacity (l) | 1.80 litres | 1.00 litres |
| Fuel Capacity | 6.43 litres / 1.70 US gallons | 6.06 litres / 1.60 US gallons |
| Wet Weight | 110.7 kg / 244.0 lbs | 111.1 kg / 245.0 lbs |
| Performance |
| Top Speed | 170.0 km/h / 105.6 mph | - |
| Max Torque | 48.0 Nm (4.9 kgf-m or 35.4 ft.lbs) @ 7000 Revolutions" | - |
| Engine |
| Fuel Control | Single Overhead Cams (SOHC) | Double Overhead Cams/Twin Cam (DOHC) |
| Engine Type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Bore x Stroke (in,) | 3.8 x 2.4 inches | 3.8 x 2.4 inches |
| Bore x Stroke (mm) | 96.0 x 62.1 mm | 97.0 x 60.9 mm |
| Displacement (cc) | 449.7 cc | 449.0 cc |
| Displacement (ci) | 27.44 cubic inches | 27.40 cubic inches |
| Engine Detail | 38mm intake valve, 31mm exhaust | Titanium-valves |
| Fuel System | Injection. Programmed Fuel Injection (PGM-FI), 46mm downdraft throttle body Read | Injection. Mikuni® fuel injection, 44mm |
| Compression Ratio | 13.5:1 | 13.0:1 |
| Engine Lubrication | - | Wet sump |
| Ignition | DC-CDI | TCI: Transistor Controlled Ignition |
| Spark Plug | - | NGK CPR8EA-9 |
| Starter | Kick | Electric |
| Valve System | 4 | 4 |
| Drivetrain |
| Chain Size | - | 520 |
| Clutch | Multi plate wet | Multiplate wet clutch |
| Final Drive | Chain (final drive) | Chain (final drive) |
| Gearbox | 5-speed | 5-speed |
| Primary Drive | #520 Chain; 13T/49T | - |
| Chassis |
| Frame Type | Aluminium twin tube | Bilateral beam frame, aluminum |
| Suspension - Front | 49mm inverted Showa fork with rebound and compression damping adjustability. | KYB Speed-Sensitive System, inverted fork: fully adjustable |
| Suspension - Rear | Pro-Link® Showa single shock with adjustable spring preload, rebound and compression damping adjustability. | KYB® single shock; fully adjustable |
| Rake | 27.2° | 26.9° |
| Seat | - | Long, two-tone, motocross-style seat |
| Trail | 114 mm / 4.5 in. | 119 mm / 4.7 in. |
| Wheel Travel - Front | 310 mm / 12.2 in. | 310 mm / 12.2 in. |
| Wheel Travel - Rear | 315 mm / 12.4 in. | 318 mm / 12.5 in. |
| Wheels & Brakes |
| Brakes - Front | Single disc. Hydraulic. Two-piston calipers. | Single disc. Hydraulic. |
| Brakes - Rear | Single disc. Hydraulic. Single-piston caliper. | Single disc. Hydraulic. |
| Brake Fluid Type | - | DOT 4 |
| Rims | Dunlop MX3S tires | - |
| Tyres - Front | 80/100-21 | 80/100-21 |