“ATV of the Year” Award
from ATV Sport Magazine. “Best
in Class” from ATV/SxS Illustrated.
Winner of shootout after shootout.
YFZ450R took ’em all –
in its first model year, right out
of the starting gate. This is one
In ATV motocross,
great power output doesn’t
mean much without superior handling.
YFZ450R delivers! The stance of
the YFZ450R is motocross ready.
The weldless frame is designed from
lightweight aluminum, with a tension-steel
bottom frame that lets the engine
sit lower for excellent mass
centralization. Suspension components
have more travel, carefully chosen
for best performance, and the front
shock bodies feature Kashima coating
even smoother operation.
Fatigue can sometimes
be a racer’s worst competition.
That’s why the YFZ450R’s
designers made this ATV so comfortable.
It boasts racerfriendly
ergonomics with plenty of room to
hang off in the corners, and the
seat is padded just right to be
more comfortable regardless of riding
Handlebars are 4-position adjustable,
too, so every rider can choose the
best position, and the throttle
has been designed for all day comfort.
This 449cc engine
uses titanium five-valve cylinder
head technology, with a camshaft
designed just for this machine to
deliver abundant low to midrange
torque for performance where you
can really use it to take the lead
– while still maintaining
a super strong top end to let you
pull away from the pack.
The YFZ450R incorporates
Yamaha Fuel Injection
for precise fuel delivery. With
big 42mm Mikuni® throttle body
and 12-hole injector, this system
provides exceptional atomization
of the fuel for maximum power. The
system also includes ISC (Idle Speed
Control) for easy, reliable
start-up and warming.
This ATV is designed
to make race prep easy. Body panels
come off easily for service; there’s
no need to remove the battery or
other components to get the fenders
off. The aluminum frame is bolted
together, rather than welded, for
maximum durability. And the oil
tank is integrated with the crankcase
so it’s easier to service
YFZ450R ATV Engine
449cc engine has superb power characteristics.
Power delivery is smooth and strong
off the line with lots of low and
mid range where you need it.
holds a crankshaft that’s
ready to handle the increased balance
ratio, as well as a counterbalancer
for superior vibration control.
The crankcase also houses the oil
tank, which helps to centralize
mass for unmatched handling and
makes maintenance easier.
are designed to maximize the torque
available in the low and mid ranges.
Fuel injection uses a 12-hole injector
that provides exceptional atomization
of the fuel for maximum combustion
efficiency and power delivery. The
system also uses a big, 42mm Mikuni®
throttle body and includes ISC (Idle
Speed Control) for easy, reliable
start-up and warming.
YFZ450R ATV Chassis/Suspension
The chassis is
very spacious, allowing room for
even an aggressive racer to move
around during the moto, and the
ATV’s body panels that the
rider contacts during operation
are of a softer plastic material
for greater comfort. The seat is
narrow in the front, yet wide and
padded in the rear to provide a
more comfortable ride, even when
hanging off on the side of the seat
in a turn.
The wheel has
been designed with the inner lip
rolled in. This increases the rigidity,
allowing a reduction in weight while
Wheels are set
motocross-spec wide, near the maximum
allowable 50 inches,
for great cornering ability. The
Dunlop® tires are grippy with
a great pattern for cornering, and
at 20 inches in the rear and 21
inches in the front, provide much
better ground clearance than the
competition. That makes the YFZ450R
fun to ride off-road, too.
handlebars are mounted on 4-way
clamps for exceptional adjustability.
There are two sets of holes in the
handlebar crown, and eccentric clamps
so the rider can choose the standard
setting, 10mm or 20mm forward, or
Foot pegs are
a generous 2.6 inches wide, something
riders will appreciate every time
they want to get up on the pegs,
with good kick-up on the ends for
The frame is aluminum
for lightweight, except for the
frame member under the engine. Here
tensioned steel is used for its
combination of strength and thinness.
This allowed the designers to sit
the engine lower overall for excellent
mass centralization for unmatched
handling. The aluminum frame is
bolted together, rather than welded,
for maximum durability.
The front frame
is noticeably narrow at the A-arm
mounting points. This dramatically
reduces changes in camber as the
long A-arms travel through their
full range of motion. The front
44mm KYB® shocks have Kashima
coating for smooth operation with
superb bump absorption and excellent
The 9.8 inches of wheel travel means
racer is up to even the most challenging
The rear swingarm
is crafted of strong, gravity-fed
aluminum, and it’s matched
to a fully adjustable 46mm KYB®
piggyback shock absorber for excellent
handling. Rear wheel travel is 11.0
inches for comfort even on tough
stopping ability, YFZ450R features
dual front hydraulic disc brakes
and a trick looking, lightweight
wave-type rear rotor.
The throttle lever
requires low effort, and it’s
to use. That means less fatigue
during all-day riding.
is all business. The discrete panel
on the fender in front of the rider
gives vital indicators about low
fuel, coolant temperature, check
engine, and neutral gear via a straightforward