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FIRST LOOK
2010 Yamaha YZ450F
Come check out all the hidden secrets to one of the most anticipated models of 2010...
Here is what Yamaha have to say about their brand new YZ450F.
The Air box is now moved up to where the fuel tank used to be.
ALL NEW 2010 YAMAHA YZ450F
YZ450F’s new rearward-slanted cylinder is a
revolutionary advancement that achieves unmatched mass centralization,
concentrating inertial mass toward the center of the machine. This bold new
design also swaps traditional intake and exhaust positions, putting the
lightweight airbox and throttle body out front. This contributes to mass
centralization for nimble handling while also achieving a straight intake tract
for superb combustion efficiency that delivers more power.
The cylinder is offset so the connecting rod is
vertical at the moment of greatest combustion force, minimizing piston friction
against the cylinder wall that could rob power. That means quicker response.
The new 4-titanium valve cylinder head is matched to a
fuel injection system developed specifically for the YZ450F. Instantly adapts
to changing air/fuel mixtures depending on altitude and temperature, for an
engine that delivers no matter what conditions.
The 'Tornado' tail pipe now exits the back on the engine.
The all-new aluminum Bilateral Beam frame provides a
superb rigidity balance that complements the engine for unmatched lightweight
handling and cornering. The result? The best cornering, most nimble 450F for
all track conditions.
Revamped looks deliver new-generation styling,
including front and rear fenders, intake cover, front fork protector, and
number plate, along with the fuel tank and seat.
Accessory GYTR® Power Tuner lets bike tuners adjust
air/fuel mixture and ignition timing maps to match engine performance
characteristics to the rider and track conditions.
The new fuel tank has been slid back to the middle of the bike under the seat.
Engine
The rearward-slanted engine allowed engineers to
design straight intake and exhaust ports, creating the most direct path for air
flow into the fuel-injected engine for incredible performance.
The YZ450F uses a battery-less fuel injection system with
a 12-hole injector for superb fuel atomization. The 44mm Keihin® throttle body
is designed for easy starting, with an integrated cold start and idle speed
adjustment knob.
Yamaha FI provides optimal air/fuel mixtures in all altitudes
and wide range of temperatures for outstanding throttle response.
14 volt / 110W high output generator powers the
battery less fuel injection system.
4-titanium valve cylinder head with a “pent-roof”
design combustion chamber provides excellent combustion efficiency and unequalled
power output.
Intake and exhaust camshaft profile changes to
increase valve working angle and valve lift for most excellent performance at
all rpm.
The bigger 97.0mm bore and shorter 60.8mm stroke,
along with a higher 12.5:1 compression ratio, create a combustion chamber that
delivers really impressive power.
Right hand side close up.
The air filter case is changed to accommodate the new
engine layout. Putting it up front keeps dirt and dust kicked up from the rear
tire away from the intake system.
New “tornado-style” exhaust header with resonator
efficiently scavenges exhaust gasses and helps the engine achieve its
exceptional low-to-mid range torque characteristics, while the 150mm-longer
muffler comfortably meets the latest noise standards without a sacrifice of
power.
Clutch and transmission components have been
thoughtfully revamped to give the rider great shifting feel.
Chassis Suspension
The aluminum Bilateral Beam frame is crafted from a
carefully chosen combination of forged and extruded aluminum, 16 components in
all, for the right rigidity balance and light weight. A very symmetrical
chassis design promotes nimble handling, letting riders enter and exit corners
as quickly as possible to put the competition behind them.
New skid plate is constructed from tough polypropylene
for great protection and low weight.
The swingarm and rear shock are redesigned, with the
shock mounted along the central axis of the frame, taking advantage of the
space no longer needed for the front-mounted airbox. This optimized combination
delivers exceptionally linear performance for excellent bump absorption and
awesome cornering ability.
The KYB® Speed Sensitive front fork has 10mm longer
stroke for excellent feel and shock absorption.
KYB® rear shock with large capacity piggy back
reservoir and 50mm piston for more consistent damping control.
New fuel tank is positioned underneath the seat,
contributing to the centralized mass. The seat is long and flat for to allow
free rider movement.
Right hand side shot.
New rear sprocket shape has a trick appearance and is
light weight.
The triple clamps are redesigned, with a change in
offset from 25 to 22 mm for unequalled cornering performance. The ProTaper®
bars are four-way adjustable to accommodate a wide range of riders.
The front and rear fenders, along with the
number plate, side cover and front fork protector have been redesigned for an
aggressive look. Less plastic is used to expose and enhance the lightweight
aluminum frame
Fuel pump is small and lightweight, as is the compact
transistor ignition unit
Left hand side clutch cut away.
Also comes in white.
2010 Yamaha YZ450F Specifications
Engine
Type 449cc
liquid-cooled DOHC 4-stroke; 4 titanium valves
Bore x Stroke 97.0
x 60.8mm
Compression Ratio 12.5:1
Fuel Delivery Yamaha
Fuel Injection (YFI), Keihin 44mm
Ignition CDI
Transmission Constant-mesh
5-speed; multiplate wet clutch
Chassis
Suspension/Front KYB
Speed-Sensitive System, inverted fork: fully adjustable, 12.2-in travel
Suspension/Rear KYB
Fully adjustable single shock; 12.4-in travel
Brakes/Front Hydraulic
single disc brake, 250mm
Brakes/Rear Hydraulic
single disc brake, 245mm
Dimensions
Length 2192mm
Width 823mm
Seat Height 998mm
Wheelbase 1491mm
Ground Clearance 380mm
Fuel Capacity 6
litres
Wet Weight 111
kgs (claimed)
there is no guarantee that these kind of shenanigans will be any easier on the new YZ450F.
...and if this hasn't whet your appetite enough - here's some tasty videos!