| General |
| Comments | - | Model ID: CRF450RX. |
| Colours | Team Yamaha Blue | Red |
| Warranty | 30 Day Limited Factory Warranty | - |
| Dimensions |
| Ground Clearance (mm) | 325 mm | 328 mm |
| Ground Clearance (in.) | 12.8 inches | 12.9 inches |
| Seat Height | 965 mm / 38.0 in. | 960 mm / 37.8 in. |
| Wheelbase | 1,466 mm / 57.7 in. | 1,476 mm / 58.1 in. |
| Height | 1,280 mm / 50.4 in. | - |
| Length | 2,164 mm / 85.2 in. | - |
| Width | 826 mm / 32.5 in. | - |
| Weights & Capacities |
| Oil Capacity (l) | 1.50 litres | - |
| Oil Capacity (Quarts) | 0.10 quarts | - |
| Fuel Capacity | 7.57 litres / 2.00 gallons | 8.33 litres / 2.20 gallons |
| Wet Weight | 112.9 kg / 249.0 lbs | 116.6 kg / 257.0 lbs |
| Engine |
| Fuel Control | Double Overhead Cams/Twin Cam (DOHC) | Single Overhead Cams (SOHC) |
| Engine Type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Bore x Stroke (mm) | 77.0 x 53.6 mm | 96.0 x 62.0 mm |
| Bore x Stroke (in,) | 3.0 x 2.1 inches | 3.8 x 2.4 inches |
| Engine Detail | Titanium valves | 38mm intake valve, titanium; 31mm exhaust, steel |
| Fuel System | Injection. Keihin® 44mm | Injection. Programmed Fuel Injection (PGM-FI) |
| Compression Ratio | 13.5:1 | 13.5:1 |
| Fuel Reserve | - | 1.60 litres / 0.42 gallons |
| Ignition | - | Full transistorized with electronic advance |
| Starter | Electric | Electric & kick |
| Valve System | 4 | 4 |
| Drivetrain |
| Clutch | Multiplate wet clutch | - |
| Final Drive | Chain | Chain |
| Gearbox | 6-speed | 5-speed |
| Primary Drive | O-ring chain | #520 T-ring-sealed chain; 13T/51T |
| Chassis |
| Frame Type | Bilateral beam frame | Semi-double cradle, aluminium twin-spar |
| Suspension - Front | KYB® spring-type fork with speed sensitive damping; fully adjustable | 49mm inverted Showa fork with rebound and compression damping adjustability |
| Suspension - Rear | KYB® single shock; full adjustable | Pro-Link® Showa single shock with adjustable spring preload, rebound and compression damping adjustability |
| Rake | 26.3° | 27.2° |
| Trail | 114 mm / 4.5 in. | 116 mm / 4.6 in. |
| Wheel Travel - Front | 310 mm / 12.2 in. | 305 mm / 12.0 in. |
| Wheel Travel - Rear | 318 mm / 12.5 in. | 312 mm / 12.3 in. |
| Wheels & Brakes |
| Brakes - Rear Diameter (in.) | 9.6 inches | 9.4 inches |
| Brakes - Front Diameter (mm) | 270 mm | 260 mm |
| Brakes - Rear Diameter (mm) | 245 mm | 240 mm |
| Brakes - Front Diameter (in.) | 10.6 inches | 10.2 inches |
| Brakes - Front | Single disc. Hydraulic. | Single disc. Two-piston calipers. |
| Brakes - Rear | Single disc. Hydraulic. | Single disc |
| Rims | Dunlop® AT81F tyres | Dunlop Geomax tires |
| Tyres - Front | 90/90-21 | 90/90-21 |
| Tyres - Rear | 110/100-18 | 120/90-18 |