FIRST LOOK AT THE TWENTY-TEN HONDA CRF250 & CRF450: Both Have EFI! They Share The Same Bodywork; Neither One Has Twin Pipes; Plus We List The Six Changes To The 2010 CRF450; See The List

July 12, 2009
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FIRST LOOK AT THE TWENTY-TEN HONDA CRF250:


Boasting an all-new, more powerful, more compact engine with Programmed Fuel Injection (PGM-FI) combined with an all-new Twin Spar Aluminum Frame featuring the Honda Progressive Steering Damper (HPSD), the 2010 CRF250 continues Honda’s long-standing position of class dominance. This latest CRF250 sets a higher benchmark for impressive power and class-leading handling all rolled into one competition-ready package.

FEATURES/BENEFITS

New for 2010

? All-new, more compact engine.

? Programmed Fuel Injection (PGM-FI).

? Progressive Steering Damper (HPSD)-equipped aluminum frame

? All-new front and rear suspension, featuring upper and lower fork tubes and a shock body developed exclusively for the CRF250R chassis.

? Redesigned higher-capacity airbox for enhanced breathing and increased power also improves filter access.

? All-new single-muffler exhaust system improves mass centralization.

? All-new bodywork.



ENGINE/DRIVETRAIN

? All-new compact engine.

? Liquid-cooled four-valve Unicam 249cc engine.

? Engine completely redesigned for improved power delivery from a significantly more compact package that lowers the center of gravity and enhances mass centralization for improved handling.

? New forged slipper-piston material permits a thinner crown. Low-friction surface treatment ensures ?high-rev potential.

? All-new Programmed Fuel Injection system (PGM-FI) utilizes a 50mm throttle body with 12-hole  injector fed by lightweight 50-psi pump to ensure optimum fuel atomization and precisely targeted fuel charge. System also improves fuel consumption.


? PGM-FI system monitors throttle position, intake air and coolant temperatures and manifold pressure to accurately map fuel charge and ignition spark, significantly improving partial-throttle response and helping to ensure excellent rideability.

? AC generator enlarged to service the PGM-FI system. Two crankshaft position sensors quickly determine crank position to provide quick starts, hot or cold.

? New mechanical water pump seal improves durability

? Kashima coating applied to the clutch basket and clutch center improves clutch life and feel.

? All-new transmission ratios match engine power output.




Chassis/Suspension

? All-new HPSD-equipped Twin-Spar aluminum frame with forged-aluminum steering head. Spar height was reduced (70mm to 66mm) and width was narrowed (27mm to 26mm). Stronger downtubes improve front-end feel.

? Steering response and overall handling were improved by positioning the front wheel 15mm farther back and closer to the crankshaft.

? Frame, steering head and swingarm modifications permit a reduction in triple-clamp offset (22mm to 20mm).

? Removable rear subframe was redesigned to eliminate brackets. Shape altered to improve air filter access and narrow the bike profile.

? HPSD features a compact damper attached to the lower triple clamp and the steering head to allow more aggressive steering characteristics and assist straight-line handling. Damping action smoothly progresses as handlebar deflection increases, which produces very natural steering characteristics and feel.


? Pro-Link Rear Suspension features exclusive Showa integrated reservoir with all-new damping and spring settings.

? Brake system integrates the rear master-cylinder and fluid reservoir, eliminating the separate reservoir and hose.

? Link-type front-brake master cylinder and a lightweight brake rotor provide strong braking.




Additional Features

? Engine stop switch features an integrated LED pre-ride check indicator. This confirms the PGM-FI system is operating normally.

? All-new higher-capacity airbox improves filter access.

? PGM-FI tuning connectors located behind radiator shroud for easier access

? Redesigned larger radiators, improve cooling performance

? New fuel-tank tether eliminates need to disconnect fuel line to work on top end.

? Rider ergonomics are optimized by adapting the handlebar, seat and footpeg height to place the rider’s legs at the narrowest part of the frame for improved comfort and handling feel.

? Adjustable front-brake lever for improved control.

? Quick-adjust clutch perch for easy cable adjustment.

? Aluminum Renthal handlebar (971 bend) is rubber-mounted to help reduce rider fatigue and improve comfort.




2010 CRF250 SPECIFICATIONS

Model: CRF250

Engine Type: 249cc liquid-cooled single-cylinder four-stroke

Bore and Stroke: 76.8mm x 53.8mm

Compression ratio: 13.2:1

Valve Train: Unicam, four-valve; 30.5mm intake, titanium; 25mm exhaust, steel

Induction: PGM-FI, 50mm throttle body

Ignition: Full transistor with electronic advance

Transmission: Close-ratio five-speed

Final Drive: #520 chain; 13T/48T

Suspension
Front: 48mm inverted Showa 16-position rebound and 18-position compression damping adjustability; 12.2 inches travel
Rear: Pro-Link Showa single shock with spring preload, 20-position rebound damping adjustability, and compression damping adjustment separated into low-speed (18 positions) and high-speed (1.5 turns); 12.6 inches travel

Brakes
Front: Single 240mm disc with twin-piston caliper
Rear: Single 240mm disc

Tires
Front: Dunlop 742FA 80/100-21
Rear: Dunlop D756 100/90-19

Wheelbase: 58.8 inches

Rake (Caster Angle): 27ø 9′

Trail: 116mm (4.56 inches)

Seat Height: 37.6 inches

Ground Clearance: 12.8 inches

Fuel Capacity: 1.5 gallons

Color: Red

Curb Weight*: 226 pounds

*Includes all standard equipment, required fluids and full tank of fuel?ready to ride.

Consult owner’s manual for optional parts.

For more photos of the 2010 Honda CRF250, please visit our photo gallery section, or simply click here.

FIRST LOOK AT THE TWENTY-TEN HONDA CRF450

 

2010 CRF450.

The perennial darling of the enthusiast press and racers alike, the CRF450 returns in 2010 to take its rightful place at the head of the class. With class-leading power and handling, the CRF450 features the perfect blend of power, suspension and handling for a genuine revolution in the premier motocross class.

The 250’s bigger brother, the 2010 CRF450, has also received some updates. The revisions include:

(1) The HRC fuel-injection tool can now be attached without removing the tank.

(2) There are new seals on the front forks.

(3) The forks have improved valving and a higher oil quantity.

(4) The rear shock now features an updated piston and a re-designed compression adjuster for improved damping.

(5) The ECU programming and fuel-injection settings have been altered to improve throttle response.

(6) There is an all-new engine auto-decompressor system for easier kick-starting.

Available in Red. In dealerships TBD. MSRP: $TBD

2010 HONDA CRF450 SPECS

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