Honda's Championship-winning expertise produces improvements that adorn the 2004 CR250R from top to bottom.
Features & Benefits
New for 2004
Aluminum Renthal Bars (971 Bend).
"Non-slip" seat cover for increased rider control.
Newly designed footpeg hinges prevent dirt accumulation for consistent footpeg angle.
Front fork tubes use same honing process as works bikes for less friction. First time on a mass production motocrosser.
Improved suspension damping characteristics for plusher, smoother suspension action.
Quick-adjust clutch perch.
Newly designed clutch lever to improve feel and action.
New engine cases to improve mixture flow for even better bottom-end power.
Redesigned free-flowing reed valves for increased bottom-end power.
TMX 38 carburetor gets new throttle position sensor (TPS) for improved linear throttle response.
Air cleaner connecting tube volume up 6.5 percent.
Shape and position of exhaust port changed for cleaner, crisper bottom end power.
Dunlop D742 front and D756 rear tires for optimum traction and cornering.
Newly designed front fender and front number plate for slimmer, more aggressive look and lighter weight.
New fork guards, engine guards and front hose clamps redesigned to reduce weight.
Air intake system offers straighter alignment to produce more direct airflow for increased power.
Engine/Drivetrain
Liquid-cooled two-stroke single-cylinder engine with 66.4mm x 72mm bore and stroke and 8.5:1 compression ratio.
Air intake boot is shaped for direct airflow, contributing to strong low-speed engine performance.
Foam gasket between airbox and air boot for better sealing and airflow management.
Lightweight 38mm flat-slide Mikuni TMX carburetor provides both initial throttle crispness and instant throttle response to complement the engine's power character. Carburetor now has throttle-position sensor (TPS) to calibrate timing with exhaust valve for improved power delivery.
Crankcase reed induction with carbon fiber eight- petal reed valve contributes to excellent off-idle throttle response and top- end and over-rev power delivery.
RC-style exhaust valve features an NSR road racing- inspired rotary flap design with electronic control. The electronic control module uses engine rpm and throttle (TPS) opening to calculate exhaust valve position and signal a DC servo motor to adjust the RC valve, providing both a smooth transition from low- to mid-range rpm and a broader torque curve.
Race-team-style cylinder porting greatly improves top-end and over-rev power delivery.
Exhaust header and expansion chamber are designed to maximize top-end power delivery.
A 16-bit CPU incorporates both the DC capacitive discharge ignition (CDI) and exhaust valve servo control, producing immediate data calculation and extremely accurate ignition and exhaust valve timing for maximum performance.
Dual radiators permit forward engine placement and provide significant cooling capacity.
Steel water-pump gear for excellent reliability.
Eight clutch plates provide significant surface area to handle the engine's torque while carefully matched clutch springs provide a light feel at the lever.
Clutch damper design improves rear suspension feel and action while accelerating over bumps.
Lightweight magnesium clutch cover.
Durable five-speed close-ratio transmission offers consistent performance in demanding conditions.
Primary kick starting system allows starting in any gear.
Chassis/Suspension
Revised suspension settings deliver more controlled suspension action along with a plusher ride.
Third-generation twin-spar aluminum frame delivers superior rider comfort and maneuverability.
Semi-double-cradle 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.
Swingarm features a dual-axis, double-taper design with a large cast aluminum cross-member.
Front and rear wheels feature HRC® works-type lightweight aluminum spoke nipples to help reduce unsprung weight.
Front wheel features large-diameter front axle and wide wheel-bearing span for additional rigidity.
Optional 20-inch front wheel improves cornering traction and rider comfort.
Rear axle diameter of 25mm and large-diameter bearings provide significant rigidity to withstand torturous track conditions.
Lightweight, 47mm inverted Showa® twin-chamber cartridge fork with aluminum rods features 12.4 inches of travel, 16- position rebound damping adjustability and 16-position compression damping adjustability. The inner surface of front fork outer-tubes receive same honing treatment as works bikes for low-friction operation. First time on a mass production motocrosser.
Pro-Link® single-shock rear suspension features a fully adjustable Showa rear damper and 12.6 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'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 reduce unsprung weight for improved turning and handling.
HRC 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 rotors provide optimum braking control.
ADDITIONAL FEATURES
Frame design allows sidecovers to have larger air intake ducts, contributing to significant airflow in the mid- and upper- rpm ranges.
Carefully developed ergonomics position the rider's legs at the narrowest cross-section of the frame for improved comfort while maintaining excellent handling feel.
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.
Seat cushion follows the shape of the fuel tank, providing a smooth transition to increase rider mobility and comfort.
New wide, cleated stainless steel footpegs are improved for self-cleaning, corrosion resistance, provide excellent grip and fold for extra ground clearance.
Cleated rear brake pedal, shift lever and folding shift lever tip are made of lightweight aluminum.
Adjustable front brake lever for maximum control.
New Renthal aluminum handlebar is rubber- mounted to reduce rider fatigue and improve comfort.
CR handlebar holders provide three different mounting positions: standard CR250R holder provides neutral position and optional holder (CRF450R/CR125R/ CRF250R-type) provides +/- 3mm fore or aft position to match rider preference.
Works-type handlebar grips add to rider comfort.
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.
Repackable silencer for maximum performance and minimal noise
Comfortable, durable controls and high-quality fasteners.
Stainless steel clutch cable for long life.
Ownership includes one-year complimentary Membership in the Honda Rider's Club of America™. Benefits include discounts, travel benefits, roadside assistance and much more. For HRCA® details, call 1-800-847-HRCA.