2012 Husqvarna SMR511
A NEW BREED
Husqvarna has always been the star of the supermotard
world. Husqvarna's numerous successes in this sport
are accompanied by the commercial success obtained
with innovative products and with a complete range
of bikes from 50cc to 630cc.
The design of the new SMR 449/511 range outstrips
that of other supermotard models and stands out immediately
for its looks, exclusive layout and cutting-edge technology.
DESIGN AND LAYOUT
The line is completely revolutionary: slim, svelte
and refined. The single piece side panel runs from
where traditionally the fuel tank would be, all the
way back to the rear mudguard, allowing the rider
free and unhindered movement. There is no chance of
snagging boots or jeans on the edges of the panels
with this design.
Besides the aesthetic and ergonomic aspects, the
new design also makes maintenance easier as the air
filter, rear shock and throttle body can all be accessed
with ease. The long seat, which runs from the rear
mudguard to the steering head, offers completely free
longitudinal movement and has been modified compared
to the Enduro version to improve rider comfort on
Aesthetics, technology and serviceability too: the
graphics on the side panels are applied using the
‘In Mould Design’ technology for increased
resistance to wear and the 2.5 litre fuel pump housing
is transparent so that the remaining fuel level can
be easily monitored.
MASSES AND CENTER OF GRAVITY
The idea behind the SMR 449/511 range is ‘mass
centralisation’ – to keep the weight of
the bike concentrated as close as possible to the
centre of gravity and to design a chassis which adapts
perfectly to the demands of use on the road and in
the racing environment. The crux of this concept is
the union of the rear wheel swing arm pivot point
and the gearbox output shaft sprocket. This solution,
which Husqvarna calls CTS (Coaxial Traction System),
eliminates the variation in the length of the chain
during rear suspension movement, minimising the effect
of the final drive on the bikes handling.
CTS also means Control, Traction and Stability,
3 fundamental features for a Supermotard bike that
requires correct control and stability in all track
conditions and optimal traction to fully exploit the
bike's excellent acceleration.
The chassis layout allows the modern DOHC engine
to be mounted closer to the centre of the bike, whilst
tilting the cylinder further forward allows a long
and straight air intake path at the same time as keeping
the centre of gravity as low as possible. This has
also meant that the throttle body and fuel injector
nozzle can be mounted in the ideal position.
Again, continuing the theme of mass centralisation,
the two part fuel tank design provides a total of
8.5 litres capacity in a low mounted 2.5 litre pump
housing and a 6 litre under seat main tank.
The under seat fuel tank layout permits the air
box to be located in a protected and fluidodynamically
favourable position above the engine with the actual
air intake being at the height of the steering column,
in a raised and sheltered position to minimise the
intake of dust or water.
The air filter box has an elongated intake manifold
and a newly designed air intake to provide greater
breathability for the sponge filter, which is easily
removed thanks to a hinge system in the air box.
The battery is located adjacent to the under seat
main fuel tank to again centralise the mass.
The SMR 449/511 bikes are equipped with a cutting-edge
4 valve dual camshaft engine which has been significantly
improved thanks to the experience gained by Husqvarna
in its many years of Supermotard racing.
Fuel delivery is managed by an electronic injection
system with a Keihin 46 mm diameter, double flap throttle
body which provides progressive and predictable throttle
The secondary gearing has been tailored to suit
the intended on road application of the bike and the
fuel/ignition mapping has been optimised for performance
and controllability in both capacity versions.
The SMR511 version has been achieved thanks to the
increased cylinder bore of 101mm compared to the 98mm
of the 449. The stroke remains the same on both models
at 59.6mm, giving the 511 an effective displacement
The clutch is controlled hydraulically, offering
smoother and more gradual release with greater control
also under stress.
The motorcycle has a high energy electronic ignition
and, thanks to the powerful battery and fuel injector
system, a supplementary kick start is not necessary.
HANDLING AND PERFORMANCE
Naturally, Husqvarna's long experience in Motard
racing has played an important part in the development
of the new motorcycles. The challenges posed by the
conception of geometry and by the general concept
of the motorcycle itself were linked to the tough
demands of riding in the most severe and extreme conditions
such as sharp changes in direction, tight bends and
winding mountain roads. The result is a surprisingly
effortless and smooth ride along with agility and
outstanding steering stability.
The chassis is perimetrical made of high strength
steel tubing. The geometry of the rear suspension
is revolutionary, with a new linkage mounted on the
upper side of the aluminium alloy swing arm.
This solution offers many advantages: it increases
the ground clearance, improves general reliability
thanks to the reduced exposure of the link and makes
But there's more: dynamically, by exploiting the
advantages of the double cradle frame made in high
strength steel tubing, the roughness of the ground
is absorbed more gradually, attenuating the stresses
on the rider.
The advantages when jumping are also remarkable
with the recoil effect of the rear wheel being significantly
reduced and the smoothness of the suspension is particularly
perceivable on rougher and more difficult ground.
All this offers great manoeuvrability and ease of
driving with a record-setting total weight for a single
cylinder Supermotard: the SMR 449/511 weighs just
118 on the kerb, without fuel.
COAXIAL TRACTION SYSTEM
A real refinement in the field of chassis design
and exclusive to the SM 449/511 range is the CTS,
the Coaxial Traction System. The solution, which originally
used a single swing arm pivot spindle, now has two
independent semi spindles which reduce the stress
on the swing arm and facilitate the replacement of
the gearbox sprocket.
The advantages of the CTS system compared to the
traditional systems are huge. During the suspension
movement along the whole stroke, the chain is not
subject to any change in length.
The tension of the chain remains constant regardless
of the swing arm position, while the chain and sprockets
benefit from reduced wear. An important positive effect
on the riding characteristics is the marked reduction
of the impact of alternating the load on the transmission.
This aspect has been studied by a spin-off company
of the University of Padova called Dynamotion which
has proved that the CTS improves traction in the various
stages of acceleration and consequently during also
the vertical movements of the suspension on rough
The result is better traction during acceleration
and surer, more confident gear changes. More in general,
the values obtained by adopting the CTS have a much
more uniform trend in all conditions, leading to improved
ridability and stability of the motorcycle.
TOP OF THE RANGE COMPONENTS
The new SMRs are equipped with the most advanced
components in the Off Road sector.
The front brake comes from Brembo with hydraulic
control, floating radial calliper with Racing origin
with four pistons and 320 mm Braking ‘wavy disks
while at the rear there is a floating calliper which
works on a Braking 240mm ‘wavy’ disk.
The front suspension consists of Marzocchi 50mm
USD forks, providing 250mm of travel and are adjustable
for compression and rebound damping. The rear shock-absorber
is a new Sachs, adjustable for pre load as well as
rebound and compression damping. The useable travel
of the rear wheel is 290 mm.
The tapered handlebars without cross bar, compact
and efficient instrumentation, shockproof plastic
engine protection and chassis protection, rear mudguard
with incorporated racing number plate and LED rear
light and short front mudguard complete the fittings.
The wide range of accessory parts available are
the best combination of lightness, resistance, performance
and allow Husqvarna fans to personalize their bikes
and offer them the ingredients for racing success.