The lightest, most powerful
ATV ever, winner of just about every magazine
shootout, 2004/ 2005 GNCC and Quadcross Championships,
2005/2006 World Four-Stroke Champion and ATV
Illustrated's Sport ATV of the Year (a tie
with our own Raptor 700R).
Most powerful, industry-exclusive,
five-titanium-valve engine and 350-pound dry
weight give the YFZ450 the best power-to-weight
ratio of any ATV ever produced.
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 fully adjustable
competition-spec Kayaba piggyback shocks with
9.1 inches of travel and separate adjusters
for preload, rebound and compression damping.
New rear suspension system
is YZ linkage-type, controlled by a fully
adjustable Showa shock with 10.6 inches of
travel and separate adjusters for preload,
rebound and compression damping.
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.
Large-capacity, 2.6 gallon
fuel tank ensures excellent range.
Dual 30-watt multireflector
halogen 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.
