FIRST LOOK! 2011 HONDA CRF450 & CRF250

August 3, 2010
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2011 HONDA CRF450

Long regarded as the bike of choice in the big-bore motocross division, the 2011 CRF450R incorporates improvements that will help this bike retain its premier standing. The prodigious powerband is now even stronger thanks to more low-end pull and midrange grunt along with enhanced throttle response via a new throttle body. Revised suspension linkage and settings yield improved control, increased ride plushness and enhanced rear-wheel traction. A new Honda Progressive Steering Damper (HPSD) produces even better tracking traits than before, and a new muffler meets the 94-decibel sound level required by some racing organizations in 2011. All this and more make the 2011 CRF450R a shoo-in to maintain its dominant role among open-class MX bikes.

NEW FOR 2011

– Revised engine tuning and new 46mm throttle body increase low-end and midrange power and give improved throttle response.

– Front fork features a lighter cartridge cylinder and all-new valving for improved control and increased ride plushness.

– Revised shock valving yields improved control and increased rear wheel traction.

– New suspension linkage produces improved chassis balance and increased rear wheel traction in rough-track conditions.

– Honda Progressive Steering Damper (HPSD) features larger piston diameter (20mm to 24mm) for improved tracking traits.

– Redesigned muffler lowers sound emissions to 94 dB.

2011 CRF450 SPECIFICATIONS

Engine Type: 449cc liquid-cooled single-cylinder four-stroke
Bore and Stroke: 96mm x 62.1mm
Compression ratio: 12.0:1
Valve Train: Unicam, four-valve; 36mm intake, titanium; 30mm exhaust, steel
Induction: PGM-FI, 46mm throttle body
Ignition: Full transistor with electronic advance
Transmission: Close-ratio five-speed
Final Drive: #520 chain; 13T/48T
Suspension   
Front: 48mm inverted KYB Air-Oil-Separate (AOS) with rebound and compression damping adjustability; 12.2 inches travel
Rear: Pro-Link KYB single shock with spring preload, rebound damping adjustability, and compression damping adjustment separated into low-speed and high-speed; 12.5 inches travel

Brakes:Front: Single 240mm disc with twin-piston caliper; Rear: Single 240mm disc
Tires   
Front: 80/100-21
Rear: 120/80-19
Wheelbase: 58.7 inches
Rake (Caster Angle): 26ø 52′
Trail: 114.2mm (4.5 inches)
Seat Height: 37.6 inches
Ground Clearance: 13.1 inches
Fuel Capacity: 1.5 gallons

2011 HONDA CRF250

Despite winning numerous comparison tests and awards in 2010, the CRF250R enters the new season sporting a number of improvements that will help it continue its winning ways. A new Honda Progressive Steering Damper (HPSD) with a larger, 24mm damper piston aids tracking precision, and new suspension settings front and rear help give this stellar-handling machine even better chassis balance for 2011. Changes to engine tuning now give the CRF250R a stronger bottom-end and midrange hit, and this model also features a new muffler that meets the 94-decibel sound level required by some racing organizations in 2011.

NEW FOR 2011

– New engine tuning produces added response and midrange power production.

– Honda Progressive Steering Damper (HPSD) features larger piston diameter (20mm to 24mm) for improved tracking traits.

– Revised fork valving offers improved balance and bottoming resistance.

– New shock valving helps deliver optimum chassis balance and improved suspension action.

– Redesigned muffler lowers sound emissions to 94 dB.

2011 CRF250 SPECIFICATIONS

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/49T
Suspension   
Front: 48mm inverted Showa 16-position rebound and 16-position compression damping adjustability; 12.2 inches 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 high-speed (3.5 turns); 12.5 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: 58.6 inches
Rake (Caster Angle): 27ø 12′
Trail: 117mm (4.6 inches)
Seat Height: 37.6 inches
Ground Clearance: 12.8 inches
Fuel Capacity: 1.5 gallons

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