Taking ATV racing to the next level.

YFZ450R / SE
www.yamaha-motor.eu/uk
Taking ATV racing to the
next level.
Serious racers will tell you that the Yamaha YFZ450R is the
clear favourite with winning riders. Its sharp-handling
chassis and ultra-responsive 450cc engine have made it
today's number one racing ATV. Nothing else comes close
A race-bred assist and slipper clutch gives more precise
control over corner entry speed for quicker lap times while the race-bred engine delivers superfast throttle
response and hard-hitting high rpm power for holeshotwinning performance.
Sharp-designed bodywork gives the rider space to shift
the bodyweight during cornering or hard acceleration.
And the lightweight piggyback shocks make for razorsharp handling!
Light action throttle lever
First ATV in its class with a slipper
clutch
Lightweight piggyback shocks for
precise handling
High compression engine for
explosive performance
Shock calibration matches tyre
character perfectly
Cam design for strong high rpm
power feeling
32-bit fuel injection for instant
response
Lightweight weldless hybrid
aluminium frame
Cast aluminium swingarm with
piggyback rear shock
Dual front discs with wave-type
rear
Quick-release fasteners for easy
bodywork removal
Roomy bodywork and padded seat
shape for comfort
YFZ450R / SE
www.yamaha-motor.eu/uk
Yamaha Sport ATVs
We know that racing isn't about compromise.
It's about being the best. And that's an
attitude reflected in the design of every
Yamaha Sports ATV.
Discover tough, lightweight frames that move
with you, while withstanding every knock and
bump. Experience ergonomic designs that
keep your body comfortable, and your mind
on what lies ahead.
At the heart of every Yamaha Sport ATV is an
engine perfected by intensive research and
development. We are as committed to
engineering excellence as you are to winning
the next race. Delivering high levels of torque
with explosive acceleration, the YFZ450R is
built to leave the competition standing.
YFZ450R / SE
www.yamaha-motor.eu/uk
Race-bred high-performance engine
The YFZ450R's race-bred 5-valve 4-stroke 450cc engine
features a compression ratio of 11.8:1 and high performance
camshafts for instant throttle response and race winning high
rpm power. The Air Induction System gives high fuel efficiency,
reduced exhaust emissions and increased durability.
Electronic Fuel Injection
For sharp throttle response the YFZ450R is equipped with a
42mm Mikuni throttle body which includes an ISC (Idle Speed
Control) system for easy and reliable starting and warming up.
This advanced system delivers instantaneous pick up and
contributes towards reduced emissions.
Hybrid chassis engineering
The YFZ450R uses a special combination of aluminium and steel in its
frame and swingarm construction, and this innovative 'hybrid chassis'
design offers a winning combination of low weight together with
outstanding strength and an excellent rigidity balance.
Assist and slipper clutch
The YFZ450R is the first ATV in its class to feature an assist and slipper
clutch that's designed to partially disengage when you're downshifting
quickly for a turn. By virtually eliminating the effects of engine braking,
the slipper clutch allows the rider to control corner entry speeds using
the brakes for enhanced control and reduced lap times.
Slick-shifting transmission
The YFZ450R's 5-speed transmission is one of the slickest shifting
systems in its class, and is fitted with an assist and slipper clutch - the
first time this race-developed technology has been used in this
category. The system makes shifting between gears even easier for
quicker lap times and reduced fatigue.
Long-travel adjustable suspension
For reduced unsprung weight this model is fitted with Kayaba piggyback
front shock absorbers and a calibrated rear shock. These adjustable
units give refined handling performance to give you the edge over other
competitors.
YFZ450R / SE
www.yamaha-motor.eu/uk
Engine
YFZ450R / SE
Engine type
Single cylinder, liquid-cooled, 4-stroke, DOHC, 5-valves
Displacement
449cc
Bore x stroke
95.0 mm x 63.4 mm
Compression ratio
11.8 : 1
Lubrication system
Dry sump
Fuel system
Fuel Injection 42 mm EHS with ISC
Ignition system
TCI
Starter system
Electric
Transmission system
5-speed, manual slipper clutch
Drive system
2WD
Final transmission
Sealed O-ring chain, eccentric adjustment
Chassis
YFZ450R / SE
Front suspension system
Independent double wishbone, threaded preload adjustable dual-rate coil-over
springs, 3-way adjustable damper, 250 mm stroke
Rear suspension system
Cast aluminium swingarm, threaded preload adjustable coil-over springs, 3-way
adjustable damper, 280 mm stroke
Front brake
Dual ventilated disc with hydraulic twin piston callipers
Rear brake
Wave-type ventilated disc with twin piston callipers
Front tyres
AT21x7R10
Rear tyres
AT20x10R9
Dimensions
YFZ450R / SE
Overall length
1,795 mm
Overall width
1,240 mm
Overall height
1,065 mm
Seat height
810 mm
Wheelbase
1,270 mm
Minimum ground clearance
115 mm
Wet weight (including full oil
and fuel tank)
184 kg
Fuel tank capacity
10.0 litres
YFZ450R / SE
www.yamaha-motor.eu/uk
Colours
Racing Blue
White
Featured accessories
GYTR® Billet
Clutch Inner Hub
GYTR® Billet
Clutch Pressure
Plate
Aluminium Sports
Front Bumper
Yamaha Racing
Grip Donuts
Pop-It Whip
Antenna
Hour & Tacho
Meter
For all YFZ450R / SE accessories go to the website, or check with your local dealer
The Yamaha Chain of Quality
Yamaha technicians are fully trained and equipped to offer the best service and advice for your Yamaha product. For
this reason, Yamaha strongly recommends visiting an official Yamaha dealer for all your service requirements.
Yamaha Genuine Parts & Accessories are especially developed, designed and tested for our Yamaha product range.
Yamaha also recommends the use of Yamalube®, our own range of high-tech lubricants - the lifeblood of Yamaha
engines. They are developed to carry on working effectively, no matter where you ride.
Besides functional and style accessories, Yamaha offers a range of high quality, innovative riding gear designed to
keep you comfortable and protected, both on- and off-road. An extensive range of casual wear is also available. For
more information go to:
www.yamaha-motor.co.uk/accessories
Experience more of the
Yamaha YFZ450R / SE with your mobile
Yamaha Motor Europe N.V., branch UK
Units A2 & A3
Kingswey Business Park
Sheerwater
Woking
Surrey
GU21 5SA
Tel: 01932 358000