2004 Honda CRF250X

Engine/Drivetrain

• Auto decompression and hot restart system make starting easy in all conditions.
• Compact, lightweight engine assembly weighs only 24kg.
• Unicam(tm) valve train provides the light weight of a compact single-cam drive 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.
• Unique, pin-rotation-type auto decompressor produces a lightweight, compact system that provides superb cold-starting and hot-restarting operation.
• 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, cylinder head cover are made of Magnesium to reduce the weight of engine.
• Forged compression slipper piston is lighter than 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(r) cylinder lining is lightweight and provides 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 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 a linear throttle response throughout the range.
• An 8-bit digital CPU incorporates the Capacitive Discharge Ignition (CDI), producing immediate data calculation and extremely accurate ignition for maximum performance.
• 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 to the engine oil, and reduces the amount of circulating oil and the required size of the oil pump.
• Vertically split crankcases feature a built-in oil pump, reducing weight compared to a conventional design.
• Exhaust system uses stainless steel exhaust header and repackable aluminum muffler with stainless steel pipe.
• Dual radiators refined core area and the number of core pipe to effective heat dissipation compared to previous dual radiator design.
• 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.
• Durable five-speed close-ratio transmission.

Chassis/Suspension

• Twin-spar aluminum frame is forth-generation design derived from Honda's CR series. Main pipe section and tapered down tube section were designed for this new frame to optimize the frame rigidity. In addition to this, tall swing arm pivot plates and thin frame spars create a narrow overall frame cross-section for superb rider comfort and maneuverability.
• CR's engine mounting method was adopted to this bike to get to good compliance of CR's and a forged aluminum steering head provides a compact and extremely durable mount for the frame spars and engine down tube.
• The aluminum frame design is matched to rider ergonomics to maximize handling and control operation.
• CR-type swingarm features a dual-axis, double-taper design with a large cast aluminum cross-member.
• CR-spec front and rear wheels feature HRC works-type lightweight aluminum spoke nipples. Compared to a conventional design, front wheel unsprung weight is reduced by 100g. Together with a revised rear wheel, hub and spoke design, rear wheel unsprung weight is reduced 450g.
• 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 significant rigidity to withstand torturous track conditions.
• Lightweight, 47mm inverted Showa(r) twin-chamber cartridge fork with aluminum dampers is derived from the CR250R and features settings unique to the CRF. The fork offers 315mm of travel, 16-position rebound and 16-position compression damping adjustability. The inner surface of front fork outer-tubes receive same honing treatment as works bikes for lowfriction operation.
• CR-type Pro-Link(r) single-shock rear suspension system features a fully adjustable Showa rear damper and 315mm of wheel travel, separate low-speed (13 positions) and high-speed (3.5 turns) compression damping adjusters and 17-position rebound damping.
• Rear shock's damper piston diameter is 50mm for consistent performance under demanding riding conditions.
• Compact dual-piston front brake caliper, anodized aluminum brake pistons and lightweight front brake disc minimize unsprung weight for improved turning and handling.
• HRC(r) works-type rear brake system integrates the rear master cylinder and fluid reservoir, eliminating the rear master cylinder reservoir and hose.
• Large, 240mm front and rear brake discs.

Additional Features

• All plastic parts (radiator shroud, side cover, rear fender, seat, fuel tank.) have a brand new design to offer comfortable riding position and sharp impression. Rider ergonomics are optimized by adapting the handlebar, the seat and the foot peg height at the narrowest crosssection of the frame, for improved comfort and handling feel.
• Frame design allows side covers to have larger air-intake ducts, contributing to significant airflow in the mid- and upper-rpm range.
• Seat cushion uses CR foam construction that follows the shape of the fuel tank, providing a smooth transition to increase rider mobility and comfort.
• Brake pedal and shift lever are designed to complement the riding position. Brake pedal features optimized ratio to match integrated rear-brake master cylinder design.
• New Renthal handlebars (971 Bend).
• Wide, cleated stainless steel foot pegs are self-cleaning, resist corrosion, provide excellent grip and fold for extra ground clearance.
• Cleated rear brake pedal and shift lever are made of lightweight aluminum.
• Adjustable front brake lever.
• Adjustable clutch lever that was adopted by '04 CR series.
• Quick clutch cable adjuster that was adopted by '04 CR series.
• Handlebar is rubber-mounted to reduce rider fatigue and improve comfort.
• CR handlebar holders provide three different mounting positions: standard CRF250R holder (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.
• Seat cover design with large grip bumps for optimum rider control.
• 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.
• A muffler for 4-stroke machine has bigger inertia moment and weight than a silencer of 2- stroke machine. Therefore sub frame was refined to get more rigidity to reduce the motion of the muffler. Pipe section and pipe layout were brand new and forged parts are adopted at the pipe-attached area. According to annual specification, it was removable to allow easy maintenance.
• Washable, two-stage foam air filter for optimal engine protection and easy maintenance.
• Repackable silencer for maximum performance and minimal noise.
• New designed change pedal top for durability.
• Single end roving glass wool in the silencer for durability.
• Comfortable, durable controls and high-quality fasteners.
• Stainless steel clutch cable for long life.
• Honda Racing-inspired colours and graphics.

Specifications CRF250R (A-type)

• Engine Type - 249cc liquid-cooled single-cylinder four-stroke
• Bore and Stroke - 78mm x 52.2mm
• Compression Ratio - 13.0:1
• Valve - Train SOHC; four-valve
• Carburation - Keihin 37mm flat-slide with throttle position sensor
• Max. Power Output - 25.9kW/11,000rpm
• Max. Torque 25.2N-m/8,500rpm
• Ignition - Solid-state CD with electronic advance
• Transmission - Close-ratio five-speed
• Final Drive -chain; 13T/51T
• Suspension - Front 47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 315mm 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 highspeed (3.5 turns); 315mm travel
• Brakes, Front - Single 240mm disc with twin-piston caliper, Rear - Single 240mm disc
• Tyres, Front - 80/100-21, Rear 100/90-19
• Wheelbase - 1,478mm
• Rake - (Caster Angle) 27.54°
• Trail - 112.2mm
• Seat Height - 953mm
• Ground Clearance - 349mm
• Dry Weight - 94.5kg
• Fuel Capacity - 7.4 litres
• Colour - Red

All specifications are provisional and subject to change without notice.