2008 Honda CRF®450X


After winning every Baja race it's entered, the CRF®450X has established its racing cred — and then some. Hands down, it's the best big-bore trail bike ever built. And this year, it gets even better, with fine-tuning that includes a new Honda Progressive Steering Damper, chassis upgrades, and a slimmer fuel tank. Call it perfection, improved.

Additional Features

  • Stainless steel clutch cable for long life.
  • Hot-start lever conveniently located on clutch perch.
  • Quick-adjust clutch perch.
  • Rider ergonomics are optimized by adapting the handlebar, seat and footpeg height to place the rider's legs at the narrowest cross-section of the frame for improved comfort and handling feel.
  • Handlebar holders provide two different mounting positions to match rider preference.
  • Rear-brake pedal and shift lever are made of lightweight aluminum and are designed to complement the riding position. Brake pedal features optimized ratio to match integrated rear-brake master cylinder design.
  • Aluminum Renthal handlebar (971 bend) is rubber-mounted to help reduce rider fatigue and improve comfort.
  • Removable rear subframe allows for easy maintenance.
  • Works-type handlebar grips add to rider comfort.
  • Purchase of a new, previously unregistered Honda USA-certified unit by an individual retail user in the United States qualifies the owner for a one-year complimentary membership in the Honda Rider's Club of America® (HRCA®). Visit www.hrca.honda.com for details.
  • Honda Racing™-inspired colors and graphics.
  • Comfortable, durable controls and high-quality fasteners.
  • Wide, cleated, stainless steel footpegs are self-cleaning, resist corrosion, provide excellent grip and fold for extra ground clearance.
  • Front disc brake cover helps protect rotor and caliper from damage.
  • Adjustable front brake lever.


  • Front wheel features large-diameter front axle and wide wheel-bearing span for excellent rigidity.
  • Revised, sophisticated inverted twin-chamber cartridge fork.
  • 25 mm rear-axle diameter and large-diameter bearings provide optimum rigidity to withstand torturous off-road conditions.
  • Large 50 mm rear shock damper piston diameter for consistent performance under demanding riding conditions.
  • HPSD features a compact damper attached to the upper triple clamp and the steering head to augment more aggressive steering characteristics and assist straight-line handling. Tuned specifically for higher speed, non-motocross, off-road riding applications, the CRF450X damper incorporates different valving/settings compared to the units on the motocross models. HPSD provides straight-line confidence at high speeds, a planted feel in corners, less rider fatigue and outstanding control over a wider variety of terrain and riding conditions.
  • HRC works-type rear brake system integrates the rear master cylinder and fluid reservoir, eliminating the need for a separate reservoir and hose assembly.
  • 18-inch rear wheel features same lightweight rear hub and HRC works-type lightweight aluminum spoke nipples as used on CRF®450R.
  • Compact twin-piston front brake caliper, anodized aluminum brake pistons and lightweight front brake disc minimize unsprung weight for improved turning and handling.
  • Fourth-generation twin-spar aluminum frame with forged-aluminum steering head.
  • Pro-Link rear suspension with new damper settings.


  • Electric starter drives the clutch side of the crankshaft to provide superior lubrication of starter gears, and produce a narrow engine with a short, strong crankshaft.
  • Twin-sump lubrication system separates the oil supply for the crankshaft, piston and valve train from the clutch and transmission. This ensures a cool supply of oil to the clutch, eliminates clutch and transmission material contamination of the engine oil, reduces the amount of circulating oil and permits the use of a smaller oil pump.
  • 40 mm Keihin FCR-type carburetor features four rollers on the flat slide, resulting in light throttle effort, smooth operation, crisp throttle response and excellent rideability.
  • Clutch cover and cylinder-head cover are made of magnesium to reduce engine weight.
  • Forged 12.0:1 compression slipper piston is lighter than a conventional design, revving quickly while maintaining excellent cylinder sealing and high-rpm power.
  • Exhaust system uses a lightweight, stainless steel exhaust header and muffler equipped with spark arrester.
  • Dual radiators feature a refined core area for improved heat dissipation compared to conventional dual-radiator design. Coolant recovery tank is located in front of the engine between the frame down-tubes for improved center of gravity. Coolant tank is protected by plastic skid-plate.
  • Durable and versatile five-speed wide-ratio transmission.
  • Lightweight titanium intake valves permit use of smaller valve springs, reducing overall engine height.
  • Carburetor features a throttle position sensor (TPS) to help maintain linear throttle response throughout the rpm range.
  • Gear-driven balancer reduces vibration and drives the water pump. Eight clutch plates provide the surface area necessary to handle the engine's massive torque, while carefully matched clutch springs provide a light feel at the lever.
  • Powerful four-stroke 449 cc liquid-cooled four-valve Unicam® engine is designed to produce power across a wide rpm band for off-road riding.
  • Nikasil cylinder lining is lightweight and provides cooler and quieter operation for extended engine life.
  • Compact, lightweight engine assembly weighs only 71-pounds.

New for 2008

  • New works-type front and rear brake discs reduce unsprung weight.
  • New Honda Progressive Steering Damper (HPSD). Developed by Team Honda, this lightweight, compact steering damper improves cornering ability and helps reduce rider fatigue.
  • Carburetor features revised settings and new accelerator pump and linkage for improved throttle response.
  • New engine de-compression system is lighter and more compact.
  • New Dunlop 742FA front tire for improved turning feel and traction.
  • New narrow-design fuel tank and seat for improved rider ergonomics.
  • New fork triple clamps with 22 mm offset and revised front axle placement improve fork action and turning traits.

Unique features

  • 18-inch rear wheel for greater flat-tire protection.
  • USDA-qualified muffler/spark arrester.
  • Resettable, easy-to-read three-digit odometer.
  • Wide-ratio five-speed transmission.
  • Suspension and chassis tuned for competitive off-road riding needs.
  • T-ring-sealed chain is approximately 1.6 mm narrower, and stronger compared to conventional chains.
  • Electric-start system for easy starting in all conditions.
  • Fuel-tank capacity is 1.9-gallons.
  • Convenient sidestand integrated into left footpeg bracket can be easily removed for competition events.
  • Skid-plate and engine guards feature a unique three-piece design.
  • Powerful 35-watt halogen headlight offers a wide range of illumination.
  • Integrated LED taillight in rear fender.

General Information

Manufacturer Honda
Model Year 2008
Model CRF®450X
Model Code CRF450X8
Stock Number 300265
Color Red


Brakes Front: Single-disc with twin-piston caliper
Rear: Single-disc
Tires Front: 80/100-21
Rear: 110/100-18


Weight Curb: 269 lbs.
Ground Clearance 13.6 in.
Wheelbase 58.2 in.
Seat Height 37.9 in.


Transmission Wide-ratio 5-speed
Final Drive #520 T-ring-sealed chain; 13T/51T


Engine Liquid-cooled, 1-cylinder, Unicam, 4-stroke
Displacement 449 cc
Bore x Stroke 96 x 62.1 mm
Compression Ratio 12.0:1
Carburetion 40 mm Keihin flat-slide
Ignition CD


Suspension Front: 47 mm inverted Showa cartridge fork with 16-position rebound & compression damping adjustability; 12.4 in. travel
Rear: Pro-Link Showa single-shock with spring-preload, 13-position (low-speed) & 3.5-turn (high-speed) compression damping & 17-position rebound damping adjustability; 12.4 in. travel
Rake 27.05°
Trail 4.5 in. (115 mm)