The lightest, most powerful ATV ever,
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 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 fl ip-type
parking brake and suspension calibrated
for performance.
The YFZ450 Special Edition is so hot,
it comes with a GYTR™ front grab bar
and heel guards plus orange/black paint
with special graphics.
Yamaha
YFZ450 ATV Engine
449cc liquid-cooled, DOHC
four-stroke with five titanium valves features
Yamaha
YFZ450 ATV Engine
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.
A 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.
Additional
Features
Yamaha
YFZ450 ATV Parking Brake
Easy-to-use, toggle link-type
handlebar-mounted parking brake can be set
with one hand.
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.