2007 Yamaha YZ450F (Blue) (discontinued)

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    They have refined on last years major revision. The changes this year will make an already excellent bike even better. I hope they can get the popping to stop.

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    Vital MX member westex
    370 westex http://p.vitalmx.com/photos/users/370/avatar/c50_370_44e36d6cd6088.jpg?1294177376 http://www.vitalmx.com/community/westex,370/all 08/16/06 2 7 14 http://www.vitalmx.com/community/westex,370/setup 8 38 2 2 1 2


    Product Yamaha YZ450F (Blue)
    Model Year 2007
    Engine Size
    Engine Type Liquid-cooled, Four-Stroke, DOHC, 5-valve
    Engine Displacement 449cc
    Bore x Stroke 95 x 63.4mm
    Compression Ratio 12.3:1
    Fuel System FCR-MX39 x 1
    Ignition Digital CDI
    Transmission Constant mesh 5-speed/wet, multiple-disc
    Final Drive Chain Drive
    Suspension Front Telescopic Fork, coil spring/oil damper, 11.8" travel
    Suspension Rear Swingarm (link, suspension), coil spring/gas-oil damper, 12.4" travel
    Brakes Front Hydraulic single disc brake, 224mm
    Brakes Rear Hydraulic single disc brake, 219.8mm
    Tires Front 80/100-21-51M
    Tires Rear 110/90-19-62M
    Overall Length 86.3"
    Overall Width 32.5"
    Overall Height 51.4"
    Seat Height 38.9"
    Wheelbase 58.8"
    Ground Clearance 14.7"
    Fuel Capacity 1.8 gal.
    Curb Weight 220 lb.
    Miscellaneous Key Features:
    • For 2007, the bike that started the four-stroke revolution benefits from significant chassis and engine refinements that ensure the five-titanium-valved YZ450F remains at the head of the open-class pack.
    • Modifications to the light and strong aluminum frame and suspension mean light, precise, confident handling at any speed.
    • Five-speed gearbox provides maximum flexibility and the right gear for a wide range of riding environments.
    • Ready to race straight out of the crate - with a ProTaper aluminum handlebar in adjustable clamps, titanium shock spring, ti footpegs, gripper seat, etc.

    New for 2007:

    • Replacing the upper cast triple clamp with a light and strong forging, slightly reducing steering head rigidity, and the use of lighter outer fork tubes; lighter wheel rims and light wave-type brake rotors add up to super-accurate, super-responsive steering.
    • Increasing the length of the rear shock by 1.5mm further sharpens handling. Replacing steel damping adjusters with aluminum ones removes even more weight from the four-way adjustable, titanium-sprung rear suspension unit.
    • A more rigid clutch pressure plate helps put power to the ground and dissipates heat more efficiently, especially during partial-clutch operation. Shorter lever stroke with 12-percent reduced effort means instant response.
    • New, titanium exhaust pipe fattens low- and mid-range power while simultaneously adhering to 2007 AMA noise regulations.
    • This year's ProTaper aluminum handlebar bend raises the grips 8mm for an expanded cockpit. Forged bar clamps reduce weight for superior handling.


    • 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.
    • Revised CDI ignition keeps that amazingly broad and deep powerband hard-hitting, yet controllable.
    • Lightweight, titanium valves and load-reduced springs minimize reciprocating mass for fast-revving, hard-hitting power delivery across the rev range.
    • Additional weight-saving engine features include: small-design cam chain tensioner and oil pump, aluminum oil hose, all-titanium exhaust header, flange, bracket and heat shield and light CDI ignition unit.
    • Primary kickstarting with automatic decompression and convenient handlebar-mounted hot start lever ensures easy restarts.
    • Kick pinion gear is separate from the primary driven gear for smoother clutch engagement.
    • Large-capacity radiator is reinforced for greater strength.


    • Aluminum frame uses a mix of alloy casting, 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 Kashina-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 - lighter fasteners for 2007 enhance weight distribution and handling.
    • Lightweight front wheel hub for reduced unsprung weight and increased durability.
    • Premium Dunlop knobbies provide unbeatable, competition-spec traction and great wear.
    • Lightweight 21-inch front and 19-inch rear Excel rims are exceptionally durable and reduce unsprung weight.

    Additional Features:

    • “Gripper” style seat cover gives excellent feel and control, and the seat is lighter for 2007.
    • Wide, cleated, folding titanium footpegs are light, strong, and provide excellent comfort, grip and ground clearance.
    • Works-style clutch lever features oversize barrel adjuster for easy, on-the-fly adjustability of lever/cable play.
    • Cleated rear brake lever and folding shift lever tip offer superb grip and excellent durability.
    • Repackable exhaust silencer.
    • Durable, comfortable handlebar grips.
    • Stainless steel clutch cable for longer life.
    Price $6,149
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