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Here is info on my 2007 Honda CRF250X
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2007 Honda CRF250X- Features & Benefits
Torrance, Calif. 06/02/2006 --
Winning magazine shootouts as well as the hearts of serious off-road riders, the
CRF250X offers a rare combination of light weight and tractable power in one of
the best handling packages in the off-road world.
New for 2007
• New cylinder-head porting inspired by the CRF(R)250R.
• New piston and rings from the CRF250R.
• Revised ignition mapping.
• Carburetor features new accelerator pump and linkage for improved throttle
response.
• New one-piece cover protects throttle cable by keeping out dirt and water.
• New front hub is lighter and stronger.
• Stronger clutch basket and clutch center for improved wear resistance.
• Lighter weight rear chain guide.
Unique Features
• Electric start system for easy starting in all conditions.
• Gas-tank capacity is 2.2 gallons.
• Resettable, easy-to-read three-digit odometer.
• USDA-qualified muffler/spark arrester.
• Powerful 35w halogen headlight features an innovative lens for a wide range of
illumination.
• Integrated LED taillight in rear fender.
• Convenient sidestand.
• Easy-access air filter.
• Wide-ratio five-speed transmission.
• Suspension tuned for competitive off-road riding needs.
• 18-inch rear wheel for greater flat-tire protection.
• T-ring-sealed chain is narrower, stronger and lighter compared to conventional
O-ring chains.
Engine/Drivetrain
• Powerful four-stroke 249cc liquid-cooled four-valve Unicam(R) engine is
designed to produce power across a wide rpm band for easy-to-control operation.
• Electric starter drives the clutch side of the crankshaft to provide superior
lubrication to starter gears, and produce a narrow engine with a short, strong
crankshaft.
• Lightweight, compact, internal auto decompressor system provides superb
cold-starting and hot-starting operation.
• Compact, lightweight engine assembly weighs only 58.2 pounds.
• Unicam valve train provides the light weight of a compact single-cam design
and the optimum combustion chamber shape for maximum power at all engine rpm.
• Unicam valve train features a carburized single camshaft that directly
actuates two 31mm titanium intake valves. The camshaft 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.
• Crankshaft is made of high-strength, low-carbon steel with carburized main
journals for maximum durability at sustained high-rpm operation.
• ACG cover, clutch cover and cylinder-head cover are made of magnesium to
reduce engine weight.
• Forged 12.9:1 compression slipper piston is lighter than a conventional
design, revving quickly while maintaining excellent cylinder sealing and
high-rpm power.
• Double-carburized connecting rod utilizes a big-end needle bearing for maximum
high-rpm performance and durability.
• Nikasil cylinder lining is lightweight and provides cooler and quieter
operation for extended engine life.
• 37mm Keihin FCR-type carburetor features four rollers on the flat slide,
resulting in very light throttle effort, smooth operation, crisp throttle
response and excellent rideability.
• Carburetor features a throttle position sensor (TPS) that helps maintain
linear throttle response throughout the rpm range.
• 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.
• Vertically split crankcases feature a built-in oil pump, reducing weight
compared to a conventional design.
• 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, and coolant recovery tank.
• 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.
• T-ring-sealed chain is approximately 1.6mm narrower and is stronger compared
to conventional chains.
• Durable five-speed wide-ratio transmission.
Chassis/Suspension
• Fourth-generation twin-spar aluminum frame is derived from Honda's CR(R)
series. Forged-aluminum steering head and tapered downtube section are designed
to optimize frame rigidity. In addition, tall swingarm pivot plates and narrow
frame spars create a narrow overall frame cross-section for superb rider comfort
and maneuverability.
• Semi-double-cradle frame design features a single, large-diameter tapered
downtube. Two rugged box-section rails attach to the base of the downtube and
support the engine. A forged-aluminum steering head provides a compact and
extremely durable mount for the frame spars and engine downtube.
• The aluminum frame design is matched to rider ergonomics to maximize handling
and control.
• Swingarm features a dual-axis, double-taper design with a large cast-aluminum
cross-member.
• 18-inch rear wheel features same lightweight rear hub and HRC works-type
lightweight aluminum spoke nipples as used on the CRF250R.
• Front wheel features large-diameter front axle and wide wheel-bearing span for
excellent rigidity.
• Rear-axle diameter of 25mm and large-diameter bearings provide optimum
rigidity to withstand torturous off-road conditions.
• Lightweight 47mm inverted Showa twin-chamber cartridge fork with aluminum
dampers is derived from the CRF250R but features settings unique to the CRF250X.
The fork offers 12.4 inches of travel, and 16-position rebound and 16-position
compression damping adjustability. The inner surface of the front fork
outer-tubes receives the same honing treatment as works bikes for low-friction
operation.
• Pro-Link(R) single-shock rear suspension system features a fully adjustable
Showa rear damper and 12.4 inches of wheel travel, separate low-speed (13
positions) and high-speed (3.5 turns) compression damping adjusters, and
17-position rebound damping.
• Rear shock damper piston diameter is 50mm for consistent performance under
demanding riding conditions.
• Compact twin-piston front brake caliper, anodized aluminum brake pistons and
lightweight front brake disc minimize 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 front and rear brake discs.
Additional Features
• All plastic body components (radiator shroud, side covers, rear fender, seat
base, fuel tank, front fender and front number plate) offer slim, aggressive
styling and light weight.
• 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.
• 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 for increased rider control.
• 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.
• Wide, cleated stainless steel footpegs are self-cleaning, resist corrosion,
provide excellent grip and fold for extra ground clearance.
• Aluminum 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/CR125R/CRF250R-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, and service life is five
times greater than conventional materials.
• Front disc brake cover helps protect rotor and caliper from damage.
• Removable rear subframe 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(TM)-inspired colors and graphics.
• Purchase of a new, previously unregistered Honda 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(TM) (HRCA(R)). Benefits include
online access to the Honda Common Service Manual, six issues of the bimonthly
Honda Red Rider(TM) magazine, travel discounts, trip routing, MSF reimbursement,
plus access to the HRCA Web site (www.hrca.honda.com). Look for the HRCA support
team at select off-road events across the country. For details on the HRCA,
dealers should call (310) 783-3958, 8:30 a.m. to 5 p.m. Pacific Time.
2007 Honda CRF250X- Specifications
Model: CRF250X
Engine Type: 249cc liquid-cooled single-cylinder four-stroke
Bore and Stroke: 78mm x 52.2mm
Compression Ratio: 12.9:1
Valve Train: Unicam; four-valve
Carburetion: Keihin 37mm flat-slide with throttle position sensor (TPS)
Ignition: CD with electronic advance and lighting coil
Starting: Electric and kick
Transmission: Wide-ratio five-speed
Final Drive: #520 T-ring-sealed chain; 13T/49T
Suspension: Front: 47mm inverted Showa cartridge fork with 16-position rebound
and 16-position compression damping adjustability; 12.4 inches travel
Rear: Pro-Link Showa single shock with spring preload, 17-position rebound
damping adjustability, and compression damping adjustment separated into
low-speed (13 positions) and high-speed (3.5 turns); 12.4 inches travel
Brakes: Front: Single 240mm disc with twin-piston caliper
Rear: Single 240mm disc
Tires: Front: 80/100-21
Rear: 100/100-18
Wheelbase: 58.3 inches
Rake (Caster Angle): 27.9o
Trail: 118mm (4.7 inches)
Seat Height: 37.7 inches
Ground Clearance: 13.6 inches
Dry Weight: 225 pounds
Fuel Capacity: 2.2 gallons
Color: Red
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