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2007 KX |
2007 KX |
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2007 Kawasaki KX Models
KX450F | 250F | KX250
2006 KX model page2007 KAWASAKI KX Models Released (6/1/06)
Kawasaki makes changes to the KX250 & 450F - the 450F is now a 5-SPEED!
The KX450F and KX250F receive changes, the rest of the line remains unchanged.
KX450F - KAWASAKI IMPROVES ITS WORLD SX CHAMPION KX™450F
Kawasaki enhances the dynamic excellence of its world SX championship winning KX™450F motocross machine with a new 5-speed gearbox plus a host of engine and chassis refinements. The 2007 KX450F offers all the dirt-shredding power from last year’s bike, with enhanced bottom end and midrange thrust for even quicker acceleration from the starting gate and stronger drive out of corners. This revised engine tuning is coupled with a new 5-speed transmission to allow greater flexibility in gear selection and increase the rider’s options on the track.Kawasaki also placed attention upon the KX450F’s frame and suspension. With a change to the frame’s downtube and new fork internals, the ’07 KX 450F boasts improved rear wheel traction and enhanced flickability, to maximize acceleration and offer easier line selection.
The new KX450F will be available in Kawasaki lime green with color matched wheel hubs and aggressive new graphics.
KX450F key features include:
449cc water-cooled overhead-cam engine with titanium valves
Revised engine tuning provides stronger low-through mid-rpm performance, with the same championship winning top-end rush
New 5-speed transmission offers better choices for dealing with technical track sections
New ball bearing shifter mechanism for smoother and more precise shifting
Thinner frame downtube reduces torsional rigidity for quicker turning and lighter steering
Larger 41mm titanium exhaust header for increased power
Larger front fork damper cartridges with revised valving for a more progressive and plush action
Revised fork seals and inner liners for reduced stiction
Revised rear suspension linkage, shock mounting and shock valving maximizes traction for better acceleration
Lighter and stronger rear hub for increased durability and less unsprung weight
New sprocket style chain roller reduces drive lash
KAWASAKI IMPROVES KX™250F MOTOCROSS BIKE
Kawasaki’s all-new four-stroke KX™250F rose to the top to become one of last years best motocross bikes. For 2007, Kawasaki improves the championship winning KX250F with a host of engine and chassis modifications designed to extend its performance advantage.Refinements to Kawasaki’s highly acclaimed KX250F make it an even more potent track weapon. The newest KX250F keeps the outstanding top-end power from last year’s bike, but adds a stronger pull from the bottom of its rev range. The upgraded engine is complimented by a strengthened 5-speed transmission and a revised chassis. Increased longitudinal rigidity resulting in lighter, quicker steering.
The new KX250F will be available in Kawasaki lime green with new color matched wheel hubs and aggressive new graphics.
KX250F key features include:
249cc water-cooled overhead-cam engine with titanium valves
New polished intake ports. This extremely-smooth surface improves intake flow at every rpm
New longer, straighter airbox funnel contributes to increased low-rpm response
New intake valves have thicker skirts and are held by longer guides for increased durability
Ultra-light thin-stem valves are further strengthened by a special treatment on their skirts
New, looser-fitting piston ring with reduced tensile strength lowers friction
Revised piston crown contributes to improved power at high-rpm
Revised carb tuning and ignition timing to suit the engine’s modifications
New 20mm taller right-side radiator offers increased cooling capacity
An all-new 5-speed transmission with thicker gears offers improved shifting and increased durability
New fork sub-springs, revised front and rear suspension valves and a new rear main spring provide a more progressive response for a better ride and increased bottoming resistance
New shock spring and revised valving for improved suspension action
A new rear shock damping adjustment needle allows more precise tuning of the sear suspension
New sub springs and revised valves for the Showa twin-chamber fork contribute to lighter, quicker handling and superior suspension action
New works-style aluminum skid plate for added protection
New rear rim with a rib-less hub and butted spokes is lighter and stronger than last year’s wheel
New “sprocket-style” chain roller helps smooth engine braking by reducing drive lash
New shift drum with modifications to the ratchet mechanism and a new ball Bearing shift lever improve shift feel
New stiffer clutch springs (up roughly 20%) gives more direct feel at the lever
2007 KAWASAKI KX250
This model remains unchanged, these details are from the 2006 model(photos are 2007 model)
The KX250 should be even better for 2006 as Kawasaki has fine tuned the engine, suspension and brakes. To make this 250 Supercross race winner quieter, the 249cc, liquid-cooled, two stroke engine features a new piston profile, while a longer, wider silencer ensures the KX250 meets modern noise emission standards. Plus, the silencer’s all-new, long-fiber packing is more durable and requires less maintenance. And to keep the KX250 at the best-possible temperature, a new water pump impeller increases coolant circulation.Changes to the KX250’s chassis include a strong, lightweight Renthal aluminum handlebar, and the rear shock now features dual compression adjustability so riders have more tuning options for both low-speed and high-speed compression damping. Up front, the Kayaba AOS fork has a new, one-piece sleeve to improve suspension action at full compression. For 2006, the KX250 has even stronger stopping power. The new petal-style disc brakes are not only lighter, but their shape helps to clean the brake pads for more efficient braking performance.
FEATURES
Engine
Piston profile helps to reduce mechanical noise
Copper-plated steel washer improves cylinder head’s sealing performance
KIPS® power valve O-ring offers improved sealing performance
Reed valve stopper features new shape to improve low-rpm response – revised shape improves scavenging efficiency by facilitating airflow through the third scavenging port
Water-pump impeller increases coolant circulation for improved high-rpm and over-rev performance
Primary gear is now secured using a key and lock-nut to help reduce mechanical noise
Kickstart lever has revised shape and mounting angle for improved durability
Silencer is slightly wider and nearly two inches longer to ensure the KX™250 meets stricter noise emission standards
Long-fiber silencer packing is more durable and requires less maintenance
Chassis
Renthal aluminum handlebar is strong and lightweight
Front and rear petal disc brakes help to reduce unsprung weight
Petal-shaped discs help to clean the brake pads for more efficient braking performance
Rear shock now features dual compression adjustability so riders have more tuning options for both lowspeed and high-speed compression damping
Fine-tuning to the Kayaba AOS (Air-Oil-Separate) fork via a new one-piece plastic sleeve inside the fork inner tubes improves suspension action at full compression
SPECIFICATIONS
Engine: Two-stroke single with KIPS®
Displacement: 249cc
Bore x stroke: 66.4 x 72.0mm
Cooling: Liquid
Carburetion: Keihin PWK38S with Power Jet
Induction: Piston reed valve
Compression ratio: 10.5 (low speed) – 9.1 (high speed):1
Ignition: Digital CDI
Transmission: Five-speed
Final drive: Chain
Frame: Perimeter style, high-tensile steel with aluminum subframe
Rake / trail: 26 degrees / 4.1 in.
Front suspension / wheel travel: 48mm inverted cartridge-type telescopic fork with 16-way compression and rebound damping / 11.8 in.
Rear suspension / wheel travel: UNI-TRAK® linkage system with 18-way low-speed compression and 2-turn high-speed compression damping, plus 16-way rebound damping and fully adjustable spring preload / 12.2 in.
Front tire: 80/100-21 51M
Rear tire: 110/90-19 62M
Front brake: Single semi-floating 250mm petal disc with dual-piston caliper
Rear brake: Single 240mm petal disc with single-piston caliper
Overall length: 86.0 in.
Overall width: 32.1 in.
Overall height: 49.8 in.
Ground clearance: 13.4 in.
Seat height: 38.0 in.
Dry weight: 213.9 lbs.
Wheel base: 58.3 in.
Fuel capacity: 2.2 gal.
Color: Kawasaki Lime Green / Black
MSRP (USA): $N/A
2007 KX450F | 2007 KX250F | 2007 KX250
2005 KX250F Test | 2005 KX250 Quick Ride
2006 model details page | 2006 KX250F Full TestTop of page | Kawasaki Index | New Models | Home
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