Yamaha YFZ450 SE

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Now even more untouchable.
The lightest, most powerful ATV ever and winner of ATV Illustrated Magazine’s "2006 Sport ATV of the Year" award is so hot, it comes with special flame graphics.

Features

Key Features:


The YFZ450 Special Edition with hi/lo-speed adjustable piggyback shocks now comes with all-black with red flames graphic package or hot flaming graphics.
Front and rear piggyback shocks adjust for high- and low-speed compression damping—as well as rebound damping and spring preload.
The lightest, most powerful ATV ever, winner of just about every magazine shootout, 2005 GNCC and Quadcross Championships, 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.

New for 2007


Front and rear piggyback shocks adjust for high- and low-speed compression damping—as well as rebound damping and spring preload.
New, ProTaper aluminum handlebar is light, strong and comfortable.
New front brake master cylinder and lever gives excellent feel and feedback.
New, drilled rear brake disc reduces unsprung weight and offers excellent feel and feedback.
A new internal oil jet aimed at the piston bottom keeps things cool and well lubricated.
An improved clutch offers consistent operation and big-time strength.

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.

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.
Ultra-rigid cast aluminum swingarm reduces weight and ensures optimal suspension action.
Titanium heat shield is super light and strong.
Long travel out back means an excellent ride and handling.
Controlled Fill cast aluminum subframe is light and super-strong.
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.
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.


SPECS

Yamaha YFZ450 SE

Engine

Type: 449cc liquid-cooled w/fan, 4-stroke; DOHC, 5 titanium valves
Bore x Stroke: 95.0 x 63.4mm
Compression Ratio: 11.4:1
Carburetion: Keihin 39mm FCR w/throttle position sensor
Ignition: DC-CDI
Starting System: Electric
Transmission: 5-speed; wet multiplate clutch
Drive Train: 2WD; sealed O-ring chain, eccentric adjustment

Chassis

Suspension/Front: Independent double wishbone, w/piggy back High-/Lo-speed compression, rebound and threaded preload adjustment, 9.1-in travel
Suspension/Rear: Cast aluminum swing arm w/rebound,High-/Lo-speed compression and threaded preload, 10.6-in travel
Brakes/Front: Dual ventilated hydraulic disc, twin piston
Brakes/Rear: Ventilated hydraulic disc, twin piston
Tires/Front: AT21x7-10 radial
Tires/Rear: AT20x10-9 radial

Dimensions

L x W x H: 72.4 x 46.1 x 42.9
Seat Height: 31.9 in
Wheelbase: 50.4 in
Ground Clearance: 4.4 in
Fuel Capacity: 2.6 gal
Dry Weight: 350 lb

Other
Lighting: Dual 30W Krypton multireflector headlights & 3.9/0.5W brake light
MSRP: $7,449

First impression

Yamaha YFZ450 SE

The YFZ450 is the top 450 sport quad on the market. It is not as comfortable of a ride on the several hour rides as some other models, but the punch and power make you forget about that as you are constantly smiling while hitting the throttle and banging gears.

It’s the fastest stock production quad on the market. This thing flies - 1st, 2nd, 3rd, if you punch it, the front end lifts. It revs forever, much like a 2 stroke. Bike handles very well in all different conditions.

For trails it’s great and it’s even better on the track. Powerslides well through turns, handles great through the woops. Climbs through rough terrain and it’s flying through the fast sections.

Yamaha succeeded to overrun their boundary with this model. Over all, one great FUN machine. Good work, Yamaha!


5 comments:

yfz is better I know because im a pimp so you can ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ..........

I’d be willing to bet my 400 ex will smoke that yfz any day of the weak. I’ve stomped everyone I’ve come across so far for three years I also have the dyno sheet to prove it. So before you talk on a 400 ex. There are some of us out there that build true race quads unlike you people that just buy because they guy behind the counter says you need it.

I will smoke the 450r or the 400ex.

hey guys go under 400ex honda the guy thinks he can smoke any yamaha with a big bore 440

yfzs are awesome they r better than the 450r

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