The lightest, most
powerful 450 class ATV, winner of
just about every magazine shootout,
2004/2006 GNCC® and Quadcross®
Championships, 2005/2006 World Four-Stroke
Champion and ATV Illustrated’s
2007 Sport ATV of the Year (a tie
with our own Raptor 700R).
Most powerful, industry-exclusive
fi ve-titaniumvalve engine and 350-pound
dry weight give the YFZ450 the best
power-to-weight ratio.
Ultra-compact, lightweight,
high-tensile steel frame with fully
adjustable suspension means YFZ450
is also the best-handling race-bred
ATV ever produced.
The YFZ450 comes
standard with pushbutton electric
starting, a convenient flip-type parking
brake and suspension calibrated for
performance.
Yamaha
YFZ450 ATV Engine
449cc liquid-cooled,
DOHC four-stroke with five
titanium valves features
95mm bore and 63.4mm stroke for massive
power with high over-rev capacity
and crisp, linear throttle response.
Large-capacity radiator
is optimally mounted in the frame
to guard against damage.
Reliable pushbutton
electric start in any gear adds extra
convenience.
High-performance
39mm Keihin® FCR flat-slide carburetor
with throttle position sensor (TPS)
delivers ultra-precise fuel/air mixing
and crisp throttle response.
Additional weight-saving
engine features include: magnesium
cylinder head cover and right-side
crankcase cover; small-design cam-chain
tensioner and oil pump; aluminum oil
hose; and light CDI ignition unit.
Trick, works-style
clutch lever features oversize barrel
adjuster for easy, no-tool adjustability
of lever/cable play.
Dry-sump engine
carries oil in an aluminum tank directly
in front of the engine for excellent
cooling and optimal protection from
rocks or mud.
DC ignition system
delivers ultra-precise spark and 3D
timing for faster, stronger engine
response during hard acceleration.
High-performance
stainless-steel exhaust header is
mated to a USFS-approved spark arrestor.
Smooth-shifting
YZ-spec ratchet-type five-speed transmission
and heavy-duty clutch deliver all
that power to the rear tires with
maximum efficiency.
Large capacity airbox
features no-tool access to the oiled
dual foam filter for easy maintenance.
Ignition coil is
integrated into the spark-plug cap;
extremely light and compact.
Yamaha
YFZ450 ATV Chassis/Suspension
Independent aluminum
upper A-arm front suspension features
competition-spec piggyback shocks
with 9.1 inches of travel and adjustable
preload, rebound and high- and low-speed
compression damping.
Rear suspension
system is YZ linkage-type, controlled
by a fully adjustable Showa shock
with 10.6 inches of travel with adjustable
preload, rebound and high- and low-speed
compression damping.
Front brake master
cylinder and lever give excellent
feel and feedback.
Drilled rear brake
disc reduces unsprung weight and offers
excellent feel and feedback.
An internal oil
jet aimed at the piston bottom keeps
things cool and well lubricated.
Titanium heat shield
is super-light and strong.
Long travel out
back means an excellent ride and handling.
Eccentric chain
adjuster mechanism simplifies that
job, and a twin-piston rear brake
caliper provides strong, controllable
rear braking.
Numerous aluminum
components—including the swingarm,
upper A-arms, oil tank, grab bars
and wheels—help keep overall
dry weight down to a paltry 350 pounds.
Controlled Fill
cast aluminum subframe is light and
super-strong.
Lightweight front
and rear master cylinders, combined
with twin 161mm front discs with twin-piston
calipers and single 200mm rear disc,
deliver incredible stopping power
with progressive control and feel.
High-performance
21x7R-10 front and 20x10R-9 rear Dunlop®
radials, designed specifically for
the YFZ450, deliver superb, class-leading
traction.
Long, low and narrow
YZ-style seat enhances the quick,
balanced steering and optimal rider
movement.
Additional
Features
Rugged 45mm-wide
serrated footrests provide excellent
grip and rider comfort.
ProTaper® aluminum
handlebar is light, strong and comfortable.
Large-capacity,
2.6-gallon fuel tank ensures excellent
range.
Dual 30-watt multireflector
Krypton headlights set back in the
front cowl add the perfect menacing
appearance. LED taillight is tough,
draws less current and has an incorporated
brake light for added convenience.
Easy-to-use, toggle
link-type handlebar-mounted parking
brake can be set with one hand.
