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Everything Dirt Bike
Make / Model Specific
Honda
Cr250r Model Changes:1998-2006
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<blockquote data-quote="onefasthonda" data-source="post: 20597" data-attributes="member: 378"><p>2005</p><p></p><p>NEW FOR 2005:</p><p>New cylinder design features RC exhaust valve housed in removable case for improved sealing. </p><p>New precision-cut stainless steel cylinder base gasket and revised port timing . </p><p>New cylinder head combustion chamber shape. </p><p>New one-piece exhaust valve for improved sealing. </p><p>New piston dome shape. </p><p>New piston features single keystone piston ring for reduced friction and improved sealing. </p><p>New crankshaft design. </p><p>New crankcase with redesigned intake port for smoother air flow and increased journal thickness to decrease crank deflection. </p><p>New six-petal reed valve with narrower profile. </p><p>New reed valve mounting angle. </p><p>New carburetor settings. </p><p>New shift fork shaft, shift forks and shift drum. </p><p>New ECU mapping and RC valve control settings. </p><p>New exhaust pipe shape has increased volume. </p><p>Thicker radiator core (from 24mm to 28mm) improves cooling capacity. </p><p>New front axle placement for improved fork action and turning. </p><p>New swingarm features a dual-axis, double-taper design with a large cast aluminum cross member that is lighter weight and stronger. </p><p>New rear hub is stronger and lighter. </p><p>New rear shock valving for improved bump absorption. </p><p></p><p>ENGINE:</p><p>New exhaust header and expansion chamber. </p><p></p><p>CHASSIS / SUSPENSION:</p><p>Revised suspension settings. </p><p></p><p>SPECIFICATIONS:</p><p>Model: CR250R</p><p>Engine Type: 249cc liquid-cooled single-cylinder two-stroke with electronically controlled RC valve</p><p>Bore And Stroke: 66.4mm x 72mm</p><p>Compression Ratio: 8.5:1</p><p>Induction: Six-petal crankcase reed-valve</p><p>Carburetion: 38mm Mikuni TMX flat-slide with throttle position sensor (TPS)</p><p>Ignition: CD with three-dimensional mapping and electronic advance</p><p>Transmission: Close-ratio five-speed</p><p>Final Drive: #520 chain; 13T/48T</p><p>Suspension Front: 47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel</p><p>Suspension 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); 12.6 inches travel</p><p>Brakes Front: Single 240mm disc with twin-piston caliper</p><p>Brakes Rear: Single 240mm disc</p><p>Tires Front: 80/100-21</p><p>Tires Rear: 110/90-19</p><p>Wheelbase: 58.3 inches</p><p>Rake (Caster Angle): 26.50 °</p><p>Trail: 109.8mm (4.32 inches)</p><p>Seat Height: 37.1 inches</p><p>Ground Clearance: 13.3 inches</p><p>Dry Weight: 213 pounds</p><p>Fuel Capacity: 2.0 gallons</p></blockquote><p></p>
[QUOTE="onefasthonda, post: 20597, member: 378"] 2005 NEW FOR 2005: New cylinder design features RC exhaust valve housed in removable case for improved sealing. New precision-cut stainless steel cylinder base gasket and revised port timing . New cylinder head combustion chamber shape. New one-piece exhaust valve for improved sealing. New piston dome shape. New piston features single keystone piston ring for reduced friction and improved sealing. New crankshaft design. New crankcase with redesigned intake port for smoother air flow and increased journal thickness to decrease crank deflection. New six-petal reed valve with narrower profile. New reed valve mounting angle. New carburetor settings. New shift fork shaft, shift forks and shift drum. New ECU mapping and RC valve control settings. New exhaust pipe shape has increased volume. Thicker radiator core (from 24mm to 28mm) improves cooling capacity. New front axle placement for improved fork action and turning. New swingarm features a dual-axis, double-taper design with a large cast aluminum cross member that is lighter weight and stronger. New rear hub is stronger and lighter. New rear shock valving for improved bump absorption. ENGINE: New exhaust header and expansion chamber. CHASSIS / SUSPENSION: Revised suspension settings. SPECIFICATIONS: Model: CR250R Engine Type: 249cc liquid-cooled single-cylinder two-stroke with electronically controlled RC valve Bore And Stroke: 66.4mm x 72mm Compression Ratio: 8.5:1 Induction: Six-petal crankcase reed-valve Carburetion: 38mm Mikuni TMX flat-slide with throttle position sensor (TPS) Ignition: CD with three-dimensional mapping and electronic advance Transmission: Close-ratio five-speed Final Drive: #520 chain; 13T/48T Suspension Front: 47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel Suspension 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); 12.6 inches travel Brakes Front: Single 240mm disc with twin-piston caliper Brakes Rear: Single 240mm disc Tires Front: 80/100-21 Tires Rear: 110/90-19 Wheelbase: 58.3 inches Rake (Caster Angle): 26.50 ° Trail: 109.8mm (4.32 inches) Seat Height: 37.1 inches Ground Clearance: 13.3 inches Dry Weight: 213 pounds Fuel Capacity: 2.0 gallons [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Honda
Cr250r Model Changes:1998-2006
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