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- 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 aluminium 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 aluminium
handlebar in adjustable clamps, titanium shock spring, ti footpegs,
gripper seat, etc.
- 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 aluminium 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 aluminium 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 carburettor 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, aluminium oil hose, all-titanium
exhaust header, flange, bracket and heat shield and light CDI
ignition unit.
- Primary kick-starting 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.
- Aluminium 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 aluminium, part
plastic) engine protector plates and thin-walled engine guard
construction.
- Removable aluminium 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.
- “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.
Warranty: 90 days Manufacturers warranty
Limited Edition White 2007 YZ 450F
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