| Model | CRF450RX | |
| ENGINE | ||
| Type | 449.8 cc liquid-cooled 10º single-cylinder four-stroke | |
| Valve Train | Unicam® OHC, four-valve; 38 mm intake, steel; 31 mm exhaust, steel | |
| Bore x Stroke | 96.0 mm x 62.1 mm | |
| Compression Ratio | 13.5:1 | |
| Induction | Programmed fuel-injection system (PGM-FI); 46 mm throttle bore | |
| Ignition | Full transistorized | |
| Starter | Push-button electric starter | |
| Transmission | Constant-mesh 5-speed; manual | |
| Clutch | Multiplate wet, hydraulically actuated (6 springs, 8 plates) | |
| Final Drive | #520 sealed chain; 13T/50T | |
| SUSPENSION | ||
| Front | 49 mm fully adjustable leading-axle inverted telescopic Showa coil-spring fork w/ 12.2 in. travel | |
| Rear | Pro-Link system; fully adjustable Showa single shock w/ 12.3 in. travel | |
| BRAKES | ||
| Front | 2-piston caliper (30 mm, 27 mm) hydraulic; single 260 mm disc | |
| Rear | 1-piston caliper hydraulic; single 240 mm disc | |
| TIRES | ||
| Front | Dunlop Geomax AT81 90/90-21 w/ tube | |
| Rear | Dunlop Geomax AT81 120/90-18 w/ tube | |
| MEASUREMENTS | ||
| Rake (Caster Angle) | 27.3° | |
| Trail | 114 mm (4.48 in.) | |
| Length | 85.6 in. | |
| Width | 33.0 in. | |
| Height | 50.4 in. | |
| Ground Clearance | 13.1 in. | |
| Seat Height | 38 in. | |
| Wheelbase | 58.3 in. | |
| Fuel Capacity | 2.1 gal. | |
| Color | Red | |
| Curb Weight* | 251 lbs. | |
*Includes all standard equipment, required fluids and full tank of fuel—ready to ride
Specifications subject to change
