2006 Honda CRF250R- Features

CRF250R

Honda innovation scores once again as the 2006 CRF250R boasts a unique dual-muffler exhaust system to improve handling and power.

Features & Benefits

New for 2006

  • New dual-muffler exhaust system centralizes mass and reduces turning inertia to improve the lightweight feel of the bike.
  • Dual-muffler exhaust system also increases low-rpm torque.
  • New piston shape increases mid- and high-rpm power.
  • New thinner piston ring for reduced engine friction.
  • Cylinder head features new exhaust port shape for improved power at high rpm.
  • Intake valve seats incorporate a new material to improve valve durability.
  • New camshaft profile increases high-rpm power.
  • New 40mm Keihin FCR carburetor increases high-rpm power.
  • New ignition mapping works in conjunction with new cylinder head and camshaft for improved power throughout the rev range.
  • New front hub is lighter and stronger.
  • New front fork outer tubes for lighter weight.
  • Radiators are mounted 5mm lower for lower center of gravity and improved weight feel.
  • New swingarm construction for lighter weight.
  • New front and rear suspension valving for improved bump absorption.

Engine/Drivetrain

  • Powerful four-stroke 249cc liquid-cooled four-valve Unicam® engine is designed to produce power across a wide rpm range for easy-to-control operation.
  • Lightweight, compact, internal auto decompression and handlebar-mounted hot-start system provide superb operation, hot or cold.
  • Compact, lightweight engine assembly weighs only 52.7 pounds.
  • Unicam 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 the 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 and rings are 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 operation for extended engine life.
  • Press-fitted aluminum spark plug pipe fits between forked exhaust rocker arms, further contributing to compact cylinder head design.
  • 40mm Keihin FCR 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.
  • 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, 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 exhaust header and repackable aluminum mufflers.
  • Dual radiators feature a refined core area for improved heat dissipation compared to conventional dual-radiator design.
  • Gear-driven balancer reduces vibration and drives the water pump. Eight clutch disks provide the surface area necessary to handle the engine's impressive torque, while carefully matched clutch springs provide a light feel at the lever.
  • Durable five-speed close-ratio transmission.

Chassis/Suspension

  • Fourth-generation twin-spar aluminum frame is derived from Honda's CR® series. Forged aluminum steering head and tapered downtube section are designed to optimize frame rigidity. In addition, tall swingarm pivot plates and thin-frame spars create a narrow overall frame cross-section for superb rider comfort and maneuverability.
  • 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 operation.
  • 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.
  • 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 twin-chamber cartridge fork with aluminum dampers. The fork offers 12.4 inches of travel, 16-position rebound and 16-position compression damping adjustability. The inner surface of the front fork outer-tubes receives same honing treatment as works bikes for low-friction operation.
  • Pro-Link® 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 rear master cylinder reservoir and hose.
  • Large, 240mm front and rear brake discs.

Additional Features

  • All plastic body components (radiator shroud, sidecovers, rear fender, seat base, fuel tank, front fender and front number plate), offer a slim, aggressive style and light weight.
  • Frame design allows airbox sidecovers to have larger intake ducts, contributing to significant airflow in the mid- and upper-rpm ranges.
  • 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.
  • 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.
  • Cleated rear brake pedal and folding 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.
  • Ownership includes one-year complimentary membership for an individual in the Honda Rider's Club of America™ (HRCA®). Benefits include: discounts, travel benefits, roadside assistance, one year of Honda Red Rider™ magazine, access to HRCA Clubhouse Web site (www.hrca.honda.com) and access online to Honda Common Service Manual. For HRCA details, call 1-800-847-HRCA. For dealers only, please call (310) 783-3958.
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