| All NEW
FOR 2009 |
- In ATV
motocross, great power output doesn’t mean much without superior
handling. YFZ450R delivers! Nearly three inches wider overall than the
YFZ450, the stance of this new 450R is motocross-ready. The frame is
designed of lightweight aluminium, with a tension-steel bottom frame
that lets the engine sit lower for excellent mass centralization.
Suspension components have more travel carefully chosen for best
performance, and the front shock bodies feature Kashima coating for
even smoother operation.
- Fatigue can
sometimes be a racer’s worst competition. That’s why the
YFZ450R’s designers made this ATV so comfortable. It’s much
roomier, with plenty of room to hang off in the corners, and the seat
is padded just right to be more comfortable regardless of riding
position. Handlebars are 4-position adjustable, too, so every rider
can choose the best position, and the throttle has been designed for
all day comfort. What’s more, the engine balancer has been revised
to even further reduce vibration.
- This 449cc
engine uses the cylinder head and cylinder from the
championship-winning YZ450 for awesome power output. That means
titanium five-valve cylinder head technology, with a camshaft designed
just for this machine to deliver abundant low to midrange torque for
performance where you can really use it to take the lead – while
still maintaining a super strong top end to let you pull away from the
pack.
- The YFZ450R
adopts fuel injection for precise fuel delivery. With big 42mm Mikuni®
throttle body and 12-hole injector, this system provides exceptional atomisation
of the fuel for maximum power. The system also includes ISC (Idle
Speed Control) for easy, reliable start-up and warming.
- This ATV is
designed to make race prep easy. Body panels come off easily for
service; there’s no need to remove the battery or other components
to get the fenders off. The aluminium frame is bolted together, rather
than welded, for maximum durability. And the oil tank is integrated
with the crankcase so it’s easier to service the engine.
|
- The
fuel-injected 449cc engine uses the cylinder head and cylinder from
the YZ450 for superb power characteristics. Power deliver is smooth
and strong off the line with lots of low and mid range where you need
it. As rpm climbs you’ll find the same top end punch that has made
the YFZ450 such a fierce competitor and class leader.
- The new
crankcase holds the newly designed crankshaft that’s ready to handle
the increased torque output, as well as the counter balancer that has
an increased ratio for superior vibration control. The crankcase also
houses the oil tank, which helps to centralize mass for unmatched
handling and makes maintenance easier.
- Camshafts
are all new for this model, and are designed to maximize the torque
available in the low and mid ranges.
- Fuel
injection uses a 12-hole injector that provides exceptional atomisation
of the fuel for maximum combustion efficiency and power delivery. The
system also uses a big, 42mm Mikuni® throttle body and includes ISC
(Idle Speed Control) for easy, reliable start-up and warming.
|
- The chassis
is very spacious, allowing room for an aggressive racer to move around
during the moto, and the ATV’s body panels that the rider contacts
during operation are of a special, softer plastic material for greater
comfort. And the seat is narrow in the front, yet wide and padded in
the rear to provide a more comfortable ride, even when hanging off on
the side of the seat in a turn.
- Wheels are
set motocross-spec wide, near the maximum allowable 50 inches, for
great cornering ability.
- The newly
designed Dunlop® front tires have a superb combination of the right
compound, tire profile, tread pattern, and sidewall-to-tread-centre-stiffness
ratio to provide outstanding comfort, bump absorption, and precise
cornering performance. The rear Dunlop® tires also help the rider
achieve a high level of performance with superb feedback in turns and
great grip on the turn exit. At 20 inches in the rear and 21 inches in
the front, the tires also provide much better ground clearance than
the competition. That makes the YFZ450R fun to ride off-road, too.
- ProTaper®
handlebars are mounted on 4-way clamps for exceptional adjustability.
There are two sets of holes in the handlebar crown, and eccentric
clamps so the rider can choose the standard setting, 10mm or 20mm
forward, or 10mm back.
- Foot pegs
are a huge 65mm wide, something riders will appreciate every time they
want to get up on the pegs, with good kick-up on the ends for solid
footing.
- The all-new
frame is aluminium for lightweight, except for the frame member under
the engine. Here tensioned steel is used for its combination of
strength and thinness. This allowed the designers to sit the engine
lower overall for excellent mass centralization for unmatched
handling.
- The front
frame is noticeably narrow at the A-arm mounting points. This
dramatically reduces changes in camber as the long A-arms travel
through their full range of motion. The front 44mm KYB shocks have
Kashima coating for smooth operation with superb bump absorption and
excellent anti-bottoming characteristics. The 9.8 inches of wheel
travel means this racer is up to even the most challenging tracks.
- The rear swing arm
is crafted of strong, gravity-fed aluminium, and it’s matched to a
fully adjustable 46mm KYB piggyback shock absorber for excellent
handling. Rear wheel travel is 11 inches for comfort even on tough
terrain.
- For
excellent stopping ability, YFZ450R features dual front hydraulic disc
brakes and a trick looking, lightweight wave-type rear rotor.
|
- The new
throttle lever requires less effort, and it’s very comfortable to
use. That means less fatigue during all-day riding.
- The
instrumentation is all business. The discrete panel on the fender in
front of the rider gives vital indicators about low fuel, coolant
temperature, check engine, and neutral gear via a straightforward LED
display.
|
|
YFZ450R
|
| - |
|
| Engine
type: |
1
cylinder, liquid-cooled, 4-stroke, DOHC, 5-valve |
| Displacement: |
449
cc |
| Bore
and stroke: |
95
x 63.4 mm |
| Compression
ratio: |
11.4
: 1 |
| Lubrication: |
Dry
sump |
| Carburettor: |
Mikuni
42mm EHS with ISC (Idle Speed Control) |
| Ignition: |
TCI |
| Starter
system: |
Electric |
| Fuel
tank capacity: |
10
litres |
| Final
Transmission: |
Chain |
| Gearbox: |
5
Speed, manual clutch |
|
|
 |
| - |
|
| Overall
length: |
1,830
mm |
| Overall
width: |
1,240
mm |
| Overall
height: |
1,095
mm |
| Wheelbase: |
1,290
mm |
| Suspension
front: |
Double
A-arm, threaded pre-load adjustable dual-rate coil-over springs,
3-way adjustable dampers, 250 mm wheel travel |
| Suspension
rear: |
Swing
arm, threaded pre-load adjustable coil-over spring, 3-way
adjustable damper, 280 mm wheel travel |
| Brake
front: |
Twin
piston, hydraulic double disc |
| Brake
rear: |
Twin
piston, hydraulic wave type disc |
| Tyres
front: |
AT
21 x 7-10 radial |
| Tyres
rear: |
AT
20 x 10-9 radial |
|
