2007 Honda CRF250X
2007 Honda CRF250X
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Hailed by magazines and serious off-road riders everywhere, the remarkable
CRF250X offers a rare combination of light weight and tractable power in one of the
best handling dirt bikes in the off-road world.
Featuring the easy dependability of push-button electric starting, enduro-style
lights to extend your fun after the sun goes down, and the strong, versatile performance
of a motocross champion that anybody can enjoy, the CRF250X pumps out more highflying
fun than you've ever enjoyed in a single dirt-riding machine.
Colours
Extreme Red (with White number plate and sidecovers)
New Features
New cylinder head porting inspired by the CRF250R.
New piston and rings from theCRF250R.
Revised ignition mapping.
Carburettor features new accelerator pump and linkage for improved throttle
response.
New one-piece cover protects throttle cable by keeping out dirt and water.
New lighter weight front wheel hub.
Stronger clutch basket and clutch centre for improved wear resistance.
Lighter weight rear chain guide.
Unique Features
Push-button electric start system for easy start-ups in all conditions.
Exhaust emissions comply with all local regulations for off-road motorcycles.
Ample 7.6-litre fuel tank capacity.
Resettable, easy-to-read three-digit competition odometer.
Spark arrester-equipped silencer complies with all local fire and noise regulations.
Powerful 35-watt halogen headlight features innovative lens design for wide range
of illumination.
Eye-catching LED taillight integrated into rear fender.
Convenient sidestand.
Easy-access urethane foam air filter.
Smooth-shifting wide-ratio 5-speed transmission.
Suspension tuned for competitive off-road riding needs.
18" rear wheel provides enhanced protection against flat tyres.
T-ring sealed chain is narrower, stronger and lighter than conventional O-ring
chains.
Engine/Drivetrain
Powerful liquid-cooled 249cm3 4-stroke 4-valve Unicam engine is designed to
produce strong power across a wide rev range for easy-to-control operation.
Electric starter drives the clutch side of the crankshaft to provide superior
lubrication of starter gears, while making possible a narrow engine with a short,
strong crankshaft.
Lightweight and compact built-in auto decompressor system provides superb coldstarting
and hot-starting operation.
Compact, lightweight engine assembly weighs only 26.4kg.
Unique 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 speeds.
Unicam valve train features a single carburised camshaft directly actuating two
31mm titanium intake valves. The camshaft's centre exhaust lobe actuates two
26mm steel exhaust valves via a forked, low-friction, roller rocker-arm.
Lightweight titanium intake valves permit use of smaller valve springs, reducing
overall engine height.
High-strength, low-carbon steel crankshaft with carburised main journals for
maximum durability at sustained high-rpm operation.
Magnesium ACG cover, clutch cover and cylinder head cover reduce engine weight.
Forged 12.9 : 1 compression slipper piston is lighter than conventional designs, for
quick-revving response while maintaining excellent cylinder sealing and high-rpm
power.
Double-carburised connecting rod utilises big-end needle bearing and thrust
washers for maximum high-rpm performance and durability.
Lightweight NiCaSil cylinder lining ensures cooler and quieter operation for
extended engine life.
Press-fitted spark plug pipe fits between forked exhaust rocker arms, further
contributing to compact cylinder head design.
37mm Keihin FCR-type carburettor features four flat slide rollers for light throttle
effort, smooth operation, crisp throttle response and excellent rideability.
Carburettor features 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.
Vertically split crankcases feature a built-in oil pump, reducing weight compared to
conventional designs.
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 designs, and a compact coolant recovery tank.
Gear-driven balancer reduces vibration and drives the water pump.
Eight-plate clutch provides surface area necessary to handle engine's strong torque,
while carefully matched clutch springs provide a light feel at the lever.
T-ring-sealed chain is approximately 1.6mm narrower and stronger than
conventional chains.
Durable 5-speed wide-ratio transmission.
Chassis/Suspension
Fourth-generation twin-spar aluminium frame derived from Honda's CR series of
championship motocrossers.
Semi-double-cradle frame design features a single, large-diameter tapered downtube
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.
Forged aluminium steering head and tapered down-tube section designed for
optimised frame rigidity. Narrow frame spars and tall swingarm pivot plates
combine to create a narrow overall frame cross-section for superb rider comfort and
manoeuvrability.
The aluminium frame design is matched to rider ergonomics to maximise handling
and control operation.
Lightweight, 47mm Showa inverted twin-chamber cartridge-type fork with
aluminium dampers is derived from the CRF250R and features settings unique to
the CRF250X. The fork offers 280mm 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 a single, fully adjustable Showa rear
damper and 312mm of wheel travel, separate low-speed (13-step) and high-speed
(3.5 turns) 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 lightweight HRC Workstype
aluminium spoke nipples as used on CRF250R 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.
Large, 240mm front and rear brake rotors.
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.
Additional Features
All plastic body components (including radiator shroud, side covers, rear fender,
seat base, fuel tank, front fender, and front number plate) are designed for slimmer,
more aggressive styling and light weight.
Rider ergonomics optimised by adapting handlebar, seat and footpeg height to
place rider's legs at frame's narrowest cross-section 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.
Non-slip seat cover enhances rider control.
Rear brake pedal and shift lever made of lightweight aluminium and designed to
complement riding position. Brake pedal features optimised ratio to match
integrated rear brake master cylinder design.
Wide, cleated stainless steel footpegs are self-cleaning, resist corrosion, provide
excellent grip and fold for extra ground clearance.
Aluminium Renthal handlebar (971 bend) is rubber-mounted to reduce rider fatigue
and improve comfort.
CR handlebar holders provide three different mounting positions: standard
CRF250X holder (CRF450R/CRF250R/CR125R-type) provides +/-3mm fore or aft
position to match rider preference, and optional holder (CR250R-type) provides
neutral position.
Works-type handlebar grips add to rider comfort.
Adjustable front brake lever.
Quick-adjust clutch.
Chain guide material offers improved wear resistance, with five times longer
service life than conventional materials.
Front disc brake cover helps protect rotor and calliper from damage.
Removable rear sub-frame allows easy maintenance.
Washable, two-stage foam air filter for optimal engine protection and easy
maintenance.
Comfortable, durable controls and high-quality fasteners.
Stainless steel clutch cable for long life.
Honda Racing-inspired colours and graphics.
Specifications CRF250X ED-type
Engine Type - Liquid-cooled 4-stroke 4-valve SOHC single
Displacement - 249.4cm³
Bore x Stroke - 78 x 52.2mm
Compression Ratio - 12.9 : 1
Max. Power Output 21.9kW / 9,000min-1 (95/1/EC)
Max. Torque - 24.2Nm / 8,000min-1 (95/1/EC)
Carburation - 37mm Keihin FCR flat slide carburettor with Throttle
Position Sensor (TPS)
Fuel Tank Capacity - 8.3 litres (including 1.5-litre reserve)
Ignition System - Computer-controlled digital capacitor discharge with
electronic advance and lighting coil
Starter - Electric / Primary kick
Transmission - 5-speed
Primary Reduction - 3.611 (65/18)
Gear Ratio - 1; 2.384 (31/13), 2; 1.750 (28/16), 3; 1.333 (28/21), 4; 1.041 (25/24), 5; 0.814 (22/27)
Final Reduction - 3.786 (53/14)
Final Drive - #520 T-ring roller chain
Frame Type - Semi-double cradle; aluminium twin-spar
Dimensions - (LxWxH) 2,174 x 827 x 1,261mm
Wheelbase - 1,481mm
Caster Angle - 27° 54'
Trail - 118mm
Seat Height - 958mm
Ground Clearance - 346mm
Dry Weight - 106kg
Kerb Weight - 114.8kg
Suspension - Front; 47mm inverted Showa leading-axle twin-chamber
cartridge-type telescopic fork with 16-step adjustable
compression and rebound damping; 280mm axle travel, Rear; Pro-Link with single Showa damper, adjustable low-speed
(13-step) & high-speed (3.5-turn) compression and 17-step
rebound damping; 312mm axle travel
Wheels - Front; Aluminium rim/wire spoke, Rear; Aluminium rim/wire spoke
Rim Size - Front; 21M/C x 1.6, Rear; 18M/C x 2.15
Tyre Size - Front; 90/90 21M/C (54R), Rear; 120/90 18M/C (65R)
Brakes - 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
All specifications are provisional and subject to change without notice.
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