2008 Yamaha YZ450F (discontinued)

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Discontinued
2008 Yamaha YZ450F  08YZ450F_FR3-4_blue
C70_08yz450f_fr3_4_blue C70_products.
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    “Untitled”

    I love my 2008 YZ450F. I have a bills system which is awsome, and the suspension is amazing!!

    Rate review: 0 Up Down
    Vital MX member bobcat
    9662 bobcat http://p.vitalmx.com/photos/users/9662/avatar/c50_628024938_1207444392.jpg?1294183094 http://www.vitalmx.com/community/bobcat,9662/all 04/05/08 4 2 3 7 13 1

    “Untitled”

    I bought mine three weeks ago and love it. Completely stock. It is an amazing bike.

    I bought mine three weeks ago and love it. Completely stock. It is an amazing bike.

    Rate review: 0 Up Down
    Vital MX member wake84
    2960 wake84 /images/default/avatar/c50.png http://www.vitalmx.com/community/wake84,2960/all 02/12/08 1 1

    “Untitled”

    my favorite part about this bike is the clean look of the shorty pipe!!!

    Rate review: 0 Up Down
    Vital MX member suzukirm12594
    2616 suzukirm12594 http://p.vitalmx.com/photos/users/2616/avatar/c50_96922310_1266898424.jpg?1294180293 http://www.vitalmx.com/community/suzukirm12594,2616/all 12/07/07 25 3 38 777 70 2 5

    Specifications

    Model Year 2008
    Engine Type Liquid-cooled DOHC 4-stroke; 5 titanium valves
    Engine Displacement 449cc
    Bore x Stroke 95.0 x 63.4mm
    Compression Ratio 12.3:1
    Fuel System FCR-MX39 x 1
    Ignition CDI
    Transmission Constant-mesh 5-speed; multiplate wet clutch
    Final Drive Chain Drive
    Suspension Front Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
    Suspension Rear Fully adjustable single shock; 12.3-in travel
    Brakes Front Hydraulic single disc brake, 250mm
    Brakes Rear Hydraulic single disc brake, 245mm
    Tires Front 80/100-21-51M
    Tires Rear 120/80-19-62M
    Overall Length 86.4 in
    Overall Width 32.5 in
    Overall Height 51.4 in
    Seat Height 38.9 in
    Wheelbase 58.8 in
    Ground Clearance 14.7 in
    Rake/Trail
    Fuel Capacity 1.8 gal
    Curb Weight 219 lb
    Miscellaneous Key Features:
    • The bike that started the four-stroke revolution benefits from chassis and engine refinements that ensure the five-titanium-valved YZ450F remains at the head of the open-class pack.
    • Subtle modifications to the aluminum frame and suspension mean light, precise, confident handling at any speed.
    • New head and exhaust design delivers stronger low- to midrange power without sacrificing top end power.
    • Ready to race straight out of the crate—with a ProTaper aluminum handlebar in adjustable clamps, titanium shock spring, gripper seat, Excel rims, etc.
    • Five-speed gearbox provides maximum flexibility and the right gear for a wide range of riding environments.

       

    New for 2008:

    • Revised intake port shapes, and revised intake and exhaust cam profiles increase combustion efficiency for improved torque and throttle response in the low- to mid-rpm range.
    • Micron-level adjustment of piston external diameter minimizes piston-to-cylinder clearance for reduced vibration and mechanical noise.
    • Adjustment of gear backlash between clutch primary gears and balancer gears achieves further mechanical noise reduction.
    • A new, larger-diameter titanium exhaust header with revised taper characteristics enhances exhaust efficiency.
    • First “punched cone” muffler ever on a production bike allows 35 percent length reduction and 270-gram weight reduction while meeting AMA noise regulations.
    • Matte black crankcase covers: light, strong and cool-looking.
    • Steering head pipe and steering stem are 5mm shorter; lower forged triple steering clamp is lighter—for enhanced handling feel. Swingarm pivot stiffness is revised to complement front-end changes and further lighten and improve steering/handling.
    • Changes to the shape of the outer fork tubes and revised internals result in improved damping and a smoother ride.
    • Optimized linkage ratio provides a smoother ride and enhanced rear wheel traction.
    • New, YZ250F-style, front-brake caliper (-220 grams) and a lighter disc remove unsprung weight and provide excellent stopping power. A new axle and collar remove additional weight.
    • A 120/80-19 rear Dunlop D756 knobby replaces the 110/90-19 for even more traction. A D742FA replaces the D739FAL front tire.
    • Wider footpegs provide excellent boot traction and rider comfort.

       

    Engine:

    • 449cc five-valve DOHC liquid-cooled engine is super-powerful yet tractable.
    • 39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) and leak jet delivers precise fuel/air mixture and instant throttle response.
    • Lightweight titanium valves and load-reduced springs minimize reciprocating mass for fast-revving, hard-hitting power delivery across the rev range.
    • Primary kickstarting with automatic decompression and convenient, handlebar-mounted hot start lever ensures easy restarts.
    • Large-capacity radiator is reinforced for greater strength.

       

    Chassis/Suspension:

    • Extensively tested aluminum frame uses a mix of alloy castings, forgings and extrusions to produce a tuned-flex frame that makes the YZ the finest-handling motocross bike ever.
    • Speed-Sensitive System 48mm Kayaba fork places transfer control valves (TCV) above the fork springs, so that damping force is controlled by piston speed: Eliminating mid-stroke damping force changes provides a smoother, more precise ride.
    • Titanium-sprung, four-way adjustable rear shock with Kashima-coated internals reduces friction for fantastic compliance and great handling.
    • More weight savings come via two-piece (part aluminum, part plastic) engine protector plates and thin-walled engine guard construction.
    • Removable aluminum rear subframe constructed of square-section tubing for light weight and easy maintenance.
    • Lightweight front-wheel hub for reduced unsprung weight and increased durability.
    • Lightweight front- and rear-brake calipers with aluminum pistons and anti-bubble front master cylinder; wave-style rotors reduce unsprung weight and deliver strong stopping power.

       

    Additional Features:

    • “Gripper” style seat cover gives excellent feel and control.
    • ProTaper aluminum handlebar for strength and performance.
    • Works-style clutch lever features oversize barrel adjuster for easy, on-the-fly adjustability of lever/cable play.
    • Repackable exhaust silencer.
    • Durable, comfortable handlebar grips.
    Price $7099.00
    More Info

    $7,099 (Team Yamaha Blue/White)
    Available from July 2007

    $7,199 (White/Red)
    Available from July 2007

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