CRF450X
CRF450X
Push-button electric start provides
easy start-ups in all conditions
All plastic body components designed for
light weight and slim, aggressive form
Spark arrester-equipped silencer
complies with all local fire,
emissions and noise regulations
Compact and rugged speedometer
with easy-to-read resettable odometer
Lightweight and compact new Honda
Progressive Steering Damper (HPSD)
developed by Team Honda
Ample 7.2-litre fuel tank
features new narrow
design for improved rider
ergonomics
Eye-catching LED taillight
integrated into rear fender
Powerful 35-watt halogen headlight
features innovative lens design
for wide range of illumination
Pro-Link rear suspension system
features fully adjustable Showa
damper with revised settings tuned
for competitive off-road riding
Lightweight 47mm Showa
inverted twin-chamber
cartridge-type fork, specially
tuned for the CRF450X
18" rear wheel with
lightweight hub
and aluminium spoke nipples
New Dunlop 742FA
front tyre for enhanced
turning feel and traction
HRC Works-type rear
brake integrates rear
master cylinder and fluid
reservoir
Swingarm features
dual-axis, double-taper
design with a large cast
aluminium cross-member
Convenient sidestand integrated into left
footpeg bracket. Can be easily removed
for competitive off-road riding
Powerful liquid-cooled, electric-start
449cm3 4-stroke 4-valve Unicam engine
Twin-spar aluminium frame
derived from Honda’s CRF series
of championship motocrossers
Compact dual-piston
calliper front brake
with anodised aluminium
pistons and lightweight rotor
All specifications are provisional and subject to change without notice.
2008 I CRF450X I Press Information
CRF450X
2008
Press Information
UK-EN – 1/6
CRF450X - 2008
Introduction
Features and Benefits
The dynamic, electric-start CRF450X takes off-road
riding to exhilarating peaks of fun and excitement,
winning hearts and minds while dominating such worldrenowned off-road endurance races as the Baja 1000.
Based on Honda’s phenomenal CRF450R big-bore 4stroke motocross racer, the CRF450X features breathtaking power, a slim, easy-to-ride form and rugged, longtravel
suspension
systems
augmented
by
a revolutionary new development: the Honda
Progressive Steering Damper (HPSD), which eases
control and smoothes handling in cornering and over
rugged terrain. For the best that off-road riding has to
offer, look to the amazing CRF450X.
New Features
Colours
• Extreme Red (with White number plate and
sidecovers)
• Lightweight and compact new Honda Progressive
Steering Damper (HPSD) developed by Team
Honda for improved cornering ability and reduced rider
fatigue.
• New front fork triple-clamps feature 22mm offset and
revised front axle placement for improved fork action and
cornering characteristics.
• New Works-style front and rear brake rotors reduce
unsprung weight.
• New Dunlop 742FA front tyre for improved turning feel
and traction.
• New narrow-design fuel tank and seat for improved
rider ergonomics.
• Carburettor features new accelerator pump and
linkage for improved throttle response.
• New lighter and
decompression system.
more
compact
engine
Unique Features
• Push-button electric start system for easy start-ups in
all conditions.
• Large 7.2-litre fuel tank capacity.
• Resettable, easy-to-read three-digit competition
odometer.
• Exhaust emissions comply with all local regulations for
off-road motorcycles.
• Spark arrester-equipped silencer complies with all
local fire and noise regulations.
• Powerful 35-watt halogen headlight provides a wide
range of illumination.
• Eye-catching LED taillight integrated into rear fender.
• Convenient sidestand integrated into left foot-peg
bracket can be easily removed for competitive off-road
riding needs.
UK-EN – 2/6
CRF450X - 2008
• Smooth-shifting wide-ratio 5-speed transmission.
• Suspension and chassis tuned for competitive offroad riding needs.
• 18" rear wheel provides enhanced protection against
flat tyres.
• T-ring sealed chain is narrower, stronger and lighter
compared to conventional O-ring chains.
• Skid-plate and engine guards feature a unique threepiece design.
Engine/Drivetrain
• Powerful liquid-cooled, electric-start 449cm³ 4-stroke
4-valve Unicam engine is designed to produce power
across a wide rpm band for easy-to-control operation.
• Compact, lightweight engine assembly weighs only
32.2kg.
• Innovative Honda Unicam valve train provides both
the light weight of a compact single-cam design and an
optimum combustion chamber shape for maximum
power at all engine rpm.
• Unicam valve train features a single carburised
camshaft directly actuating two 35mm titanium intake
valves. The camshaft’s centre exhaust lobe actuates two
30mm steel exhaust valves via a forked, low-friction,
roller rocker-arm.
• 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.
• Lightweight titanium intake valves permit use of
smaller valve springs, reducing overall engine height.
• ACG cover, clutch cover and cylinder head cover are
made of magnesium to reduce engine weight.
• Forged 12 : 1 compression slipper piston is lighter
than conventional designs, for quick-revving response
while maintaining excellent cylinder sealing and high-rpm
power.
• Lightweight NiCaSil cylinder lining ensures cooler and
quieter operation for extended engine life.
• 40mm Keihin FCR-type carburettor features four
rollers on the flat slide, resulting in very light throttle effort,
smooth operation, crisp throttle response and excellent
rideability.
• Carburettor features a throttle position sensor (TPS)
that helps maintain linear throttle response throughout
the rpm range.
• Twin-sump lubrication system separates oil supply to
crankshaft, piston and valve train from supply to clutch
and transmission. This ensures a steady supply of cool
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.
• Exhaust system uses a lightweight stainless steel
exhaust header and silencer equipped with spark
arrester.
• Dual radiators feature a refined core area for improved
heat dissipation compared to conventional dual-radiator
designs. Coolant recovery tank is located underneath
engine for improved mass centralisation. Coolant tank is
protected by a plastic skid-plate.
• Gear-driven balancer reduces vibration and drives
the water pump. Eight-plate clutch provide the surface
area necessary to handle the engine’s massive torque,
while carefully matched clutch springs provide a light feel
at the lever.
• T-ring-sealed chain is approximately 1.6mm narrower
and stronger compared to conventional chains.
• Durable and
transmission.
versatile
5-speed
wide-ratio
Chassis/Suspension
• Advanced fourth-generation twin-spar aluminium
frame.
UK-EN – 3/6
CRF450X - 2008
• HPSD features a compact damper attached to
the lower 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 and
settings compared to units mounted on motocross
models. HPSD provides confident straight-line control at
high speeds, a planted feel in corners, less rider fatigue
and outstanding handling over a wider variety of terrain
and riding conditions.
• Semi-double-cradle frame design features a single,
large-diameter tapered down-tube for optimised frame
rigidity, with two rugged box-section rails attached to its
base to support the engine. A forged aluminium steering
head provides a compact and extremely durable mount
for the frame spars and engine down-tube.
• Lightweight 47mm Showa inverted twin-chamber
cartridge-type fork with aluminium dampers is derived
from the CRF450R and features settings unique to
the CRF450X. The fork offers 315mm of travel, 16-step
rebound and 16-step compression damping
adjustability. The inner surfaces of the front fork outer
tubes receive the same honing treatment as Works bikes
for low-friction operation.
• Pro-Link rear suspension system features single, fully
adjustable Showa rear damper with newly revised
damper settings and 313mm of wheel travel, separate
low-speed (13-step) and high-speed (3.5-turn)
compression damping adjusters, and 17-step adjustable
rebound damping.
• Large 50mm rear damper piston diameter provides
consistent performance under demanding riding
conditions.
• Swingarm features a dual-axis, double-taper design
with a large cast aluminium cross-member offering high
strength and light weight.
• Front wheel features large-diameter front axle and
wide wheel-bearing span for excellent rigidity.
• 18" rear wheel features same lightweight rear hub and
HRC Works-type lightweight aluminium spoke nipples as
used on CRF450R for reduced unsprung weight.
• Large 25mm diameter rear axle and large-diameter
bearings provide optimum rigidity and strength to
withstand torturous track conditions.
• Compact dual-piston front brake calliper, anodised
aluminium brake pistons and lightweight front brake rotor
minimise unsprung weight for improved turning and
handling.
• HRC Works-type rear brake system integrates
the rear master cylinder and fluid reservoir, eliminating
the need for a remote master cylinder reservoir and hose
assembly.
• Large 240mm Works-type front and rear brake rotors.
Additional Features
• All plastic body components (including radiator
shroud, side covers, rear fender, seat base, fuel tank,
front fender, and front headlight) designed for slim,
aggressive styling and lighter weight.
• Rider ergonomics optimised by adapting handlebar,
seat and footpeg height to place rider’s legs at frame’s
narrowest frame width for improved comfort and
handling feel.
• Seat cushion uses foam construction that follows
the shape of the fuel tank, providing a smooth transition
to increase rider mobility and comfort.
• Rear brake pedal and shift lever made of lightweight
aluminium and designed to complement the riding
position. Brake pedal features optimised ratio to match
integrated rear brake master cylinder design.
• Wide, cleated stainless steel footpegs are selfcleaning, corrosion-resistant, provide excellent grip and
fold for extra ground clearance.
• Aluminium Renthal handlebar (971 bend) is rubbermounted to reduce rider fatigue and improve comfort.
UK-EN – 4/6
CRF450X - 2008
• Handlebar holders provide two different mounting
positions to match rider preference.
• Works-type handlebar grips add to rider comfort.
• Adjustable front brake lever.
• Hot-start lever conveniently located on clutch perch.
• Quick-adjust clutch perch.
• Chain guide material offers improved wear resistance,
with service life five times greater than conventional
materials.
• Front disc brake cover helps protect rotor and calliper
from damage.
• Removable rear sub-frame allows easy maintenance.
• Comfortable, durable controls and high-quality
fasteners.
• Stainless steel clutch cable for long life.
• Honda Racing-inspired colours and graphics.
UK-EN – 5/6
CRF450X - 2008
Specifications
Suspension
General
Model
Front
47mm Showa inverted leading-axle twinchamber cartridge-type telescopic fork with
16-step adjustable compression and rebound
damping; 315mm axle travel
Rear
Pro-Link with Showa damper, adjustable lowspeed (13-step) and high-speed (3.5-turn)
compression and 17-step rebound damping;
313mm axle travel
Type
Front
Aluminium rim/wire spoke
Rear
Aluminium rim/wire spoke
Rim Size
Front
21M/C x 1.60
Rear
18M/C x 2.15
Front
90/90 21M/C (54R)
Rear
140/80 18M/C (70R)
Front
240 x 3mm hydraulic disc with dual-piston
calliper and sintered metal pads
Rear
240 x 4mm hydraulic disc with single-piston
calliper and sintered metal pads
CRF450X
Mold Type
ED-type
Type
Engine
Type
Liquid-cooled 4-stroke 4-valve SOHC single
Displacement
449cm³
Bore x Stroke
96 x 62.1mm
Compression Ratio
12 : 1
Max. Power Output
33.2kW / 7,500min-1 (95/1/EC)
Max. Torque
43.1Nm / 7,000min-1 (95/1/EC)
Wheels
Fuel System
40mm Keihin FCR flat-slide carburettor with
throttle position sensor (TPS)
Carburation
Fuel Tank Capacity
Tyre Size
7.2 litres
Brakes
Electrical System
Ignition System
Computer-controlled digital capacitor
discharge with electronic advance and lighting
coil
Starter
Electric / Primary kick
Type
Drivetrain
Transmission
5-speed
Primary Reduction
2.739 (63/23)
Gear Ratios
2.231 (29/13)
2
1.625 (26/16)
3
1.235 (21/17)
4
1.000 (19/19)
5
0.826 (19/23)
Final Reduction
3.923 (51/13)
Final Drive
#520 T-ring sealed chain
Frame
Type
Semi-double cradle; aluminium twin-spar
Chassis
Dimensions
2,178 x 821 x 1,273mm
Wheelbase
1,480mm
Caster Angle
27° 3'
Trail
114.7mm
Seat Height
963mm
Ground Clearance
345mm
Kerb Weight
121.4kg
All specifications are provisional and subject to change without notice.
UK-EN – 6/6
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