DUCATI MONSTER S4Rs
The Monster S4Rs is a bike without compromise, a true superbike
in every way. Only the full fairing has been removed. Nothing else has
been sacrificed. All the legendary Superbike power and character of the
potent desmodromic Testastretta engine remains. The new,
amazingly powerful Ducati Monster S4Rs is as unique as
its name, and the pace-setter that all other naked models must
measure up to. Ducati leads the way in naked motorcycles, and
is always coming up with something new and original and is determined to
maintain it..
The Monster S4Rs is a
masterpiece of technology and design. One glance at the bike,
even parked, is enough to make your heart miss a beat and your breathing
quicken. Just look at the harmony of the design and the
precision of the engineering. In its premier performance, and
taking centre stage is the Testastretta engine,
embraced by Ducati’s legendary trellis frame and the unmistakable
styling that has always characterised a Monster.
The styling is that of a spectacular, custom, the sort
of bike we could previously only dream of. Yet the Monster S4Rs
Testastretta is impressively real. The sensation of power oozes
from every pore. In addition to the common features shared by all Ducati
Monsters with single sided swingarms, like the small upper
fairing, vertically stacked twin exhausts and
longitudinal stripe (bigger and centrally positioned on
the S4Rs), the S4Rs also incorporates a large number of
eye-catching racing components.
The S4Rs features new graphics and colour schemes to
enhance the 999-derived front end and the
Y-spoke wheels that recall the racing origins of this naked
superbike. In fact, Ducati Corse has contributed a large number of small
but important details to this Monster, details that might not be noticed
under a full fairing but that cry out for attention on this meanest of
all Monsters, like the triangular oil cooler for
example. Add to that a long list of carbon fibre parts,
plus the stunning twin aluminium exhausts and the performance
first priority of the S4Rs is obvious. The Monster S4Rs looks
aggressive and stunningly essential. It tells you in no uncertain terms
what sort of performance, technology, design and passion
lies in front of you.In short, the S4Rs Testastretta is a
dream machine, with a look and feel that satisfies even
before you twist the throttle.
TECHNICAL FEATURES
Frame and chassis
The
central feature of this most powerful Monster’s chassis remains its
trellis frame formed in high strength ALS 450 steel tubing.
The frame of the new Monster S4Rs boasts 5% greater
torsional rigidity than that of the previous Monster S4R, due
to design improvements around the airbox.
The swingarm is Ducati’s exclusive single sided unit
that equips all members of the SR family. This elegantly crafted rear
suspension component is made from a complex tubular aluminium
trellis.
The swingarm on the top of the range S4Rs is finished in black
in keeping with Ducati Racing style.
The tapered aluminium alloy handlebars feature a variable
cross-section . Diameter is 22 mm at the grips, but increases
to 28 mm at the centre to give the best possible weight to
rigidity ratio. This design allows a reduction in the thickness
of the handlebar tube from the usual 5 mm to 4 mm.
As with all SR series Monsters, compared to most naked motorcycles, the
seat-handlebar-footpeg position is unique and decidedly aggressive and
sport oriented.
The chassis of the Monster S4Rs boasts a 1440 mm wheelbase
and a trail of 96 mm, achieved by offsetting the fork
legs 30 mm ahead of the steering axis and giving the steering head a
rake angle of 24°.
Suspension
As you would expect of a true naked, Superbike, the
new Monster S4Rs is equipped with some of our best components, derived
directly from the world of racing.
The front end features 43 mm Ö hlins upside down forkswith
titanium nitride coated stanchions for smoother action and more
sensitive control. This fork is almost identical to those used on
Ducati’s top of the range superbikes, and boasts adjustable
compression and rebound damping, and spring preload.
The rear shock is also Ö hlins , and incorporates a
piggy-back reservoir, and also permits a wide range of
adjustments for compression, rebound and spring preload. One
important detail is the innovative preload adjuster ring, made from a
plastic and carbon fibre mix for easier adjustment and reduced weight.
This new shock weighs in at only 2,690 grams (18% or 580 grams lighter
than the unit on the S4R).
Just like the top models in the Ducat supersport range, the S4Rs offers
the unique Ducati rear height adjustment system,
allowing the rider to set rear ride height separate from, and without
effecting spring pre-load.
With a professional suspension configuration such as this, every rider
can set up the bike to match riding style and surface conditions,
whether it be on the road or track.
Wheels
The attention to detail that Ducati has put into the
design of the new S4Rs is further conformed by the choice of wheels,
carefully selected for unbeatable rigidity and lightness.
At the rear we find a new, super-lightweight Marchesini
aluminium wheel with 5 ‘Y’ spokes, 1,300 grams (23%) lighter
and with 18% less inertia than the rear wheel fitted to the S4R. The
result is dramatically reduced unsuspended mass for easier, more
precise control.
The front wheel is also by Marchesini, again with 5 ‘Y’ spokes, in
aluminium alloy. This is the same wheel that is fitted to the Ducati
999S.
Brakes
Of the many racing components that enhance the looks
and technical excellence of this mighty Monster, the Brembo braking
system is one of the first to catch the eye. At the front
the S4Rs is equipped with a radial master cylinder
with a 19 mm piston and separate reservoir, coupled with a pair
of radial calipers, with four 34 mm pistons and four
separate pads. The Brembo logo is milled into the
caliper casting and finished in red paint, just as on the
Desmosedici GP6. The two discs are 320 mm in diameter, 4.5 mm thick and
are mounted on special aluminium alloy flanges.
The rear braking system is also by Brembo and comprises a master
cylinder with an 11 mm piston and a fixed caliper with two opposed 32 mm
pistons and a 245 mm disc.
Exhaust system
The S4Rs is equipped with the latest evolution of the
exhaust that equips the entire SR range. This layout
incorporates a special pre-silencer slung under the
engine and connected to two compact vertically stacked silencers
mounted high to one side.
The exhaust system has been completely redesigned to
squeeze the last ounce of power out of the low sump Testastretta. The
primary down pipes and secondary collectors have increased to 45 mm in
diameter (vs. 40 mm of the S4R), and the exhaust gas path has also been
redesigned and updated to bring emissions within the strict limits
imposed by Euro 3 legislation.
The Lambda probe inside the pre-silencer maximises the
efficiency of the new three-way catalytic converter,
also housed inside the pre-silencer.
The S4Rs’s new exhaust system is made even more eye-catching by
three carbon fibre heat guards fitted to the top silencer and
to the secondary collector pipes to protect the rider’s feet.
Electronics
The electrical system of the new
Monster S4Rs has been totally revolutionised to
eliminate all visible cables, to achieve a clean uncluttered
look, and to provide easy access to all mains parts. The key components,
such as the electronic control unit, battery, fuses and relays are
located above the vertical cylinder head and are easily accessible
simply by lifting the tank.
Magneti Marelli ’s 5AM electronic control unit has been
selected to manage the Testastretta’s fuel injection and ignition
systems. This unit incorporates hybrid electronic circuits on
multistrate ceramic surfaces with an exceptionally high level of
integration. The unit is extremely compact in size as a result. The 5AM
has a flash EPROM to allow operating parameters to be reprogrammed
repeatedly during development and tuning. The unit also houses the power
circuits for the two ignition coils and for the two IWP 189
12-hole injectors (one per cylinder) as used on our race bikes
which provide superior atomisation of the fuel spray.
The use of a stepper motor to provide automatic control
of idling speed is another major innovation. This method of idling
control is extremely effective in maintaining smooth and regular idling
even as the engine’s component characteristics change over time as the
result of normal wear and tear on mechanical engine parts. The throttle
body no longer needs a cold starting device, and this in turn means a
far simpler butterfly valve control system. The idling speed regulator
has a horizontal slider, moved by a lead nut system connected to a
stepper motor.
Engine
The S4Rs clearly surpasses all expectations when it
comes to the engine. It is the new reference point for all super-nakeds,
created by the overwhelming desire and delicate operation of
transplanting a Testastretta twin into the trellis
frame of the Monster.
The compact 90 º twin cylinder design that graces all Ducatis enables us
to make uniquely narrow and agile motorcycles that are surprisingly
similar to racing machines. This twin cylinder powerplant delivers
amazingly muscular power compared to the average four cylinder engine,
to say nothing of fantastic torque that delivers thrilling acceleration
and unrivalled riding sensations.
The Testastretta engine’s capabilities needs little introduction. Its
prestige and fame have been won on the circuits of the World SBK
Championship. This twin is the maximum technical expression of the
ingenuity of Ducati, and outclasses even the most powerful four
cylinder engines. Its sound alone is enough to get the
adrenaline pumping! The Testastretta represents a
milestone in Ducati’s Superbike history. It owes its name to the
special configuration of the cylinder head, which minimises the angle
between the valves. Its ‘narrow head’ design creates a compact,
cleaner and therefore more efficient combustion chamber. The flat crown
pistons are the optimum shape to produce a smooth and linear flame
front. The special head design, combined with advanced electronic engine
management, also ensures efficient combustion at all engine speeds, for
smooth, controllable power. The S4Rs uses the most advanced ‘low sump’
version of the Testastretta engine. This is the technical solution used
on racing Ducatis, with the sole difference being that the sump on the
production engine is die cast versus the sand cast of the race bikes.
The special shape of this sump ensures that the oil pump remains
immersed in lubricant under the most extreme lean angles and G-forces,
on road and track alike.
A large number of engines parts of the Testastretta engine have
been specially designed and re-engineered to enable it to best suit the
dynamics and style of the flagship of the Monster range . Those
that stand out the most are the reshaped sump, modified
at the rear to accommodate the single sided swingarm, the new
carbon fibre timing belt covers, and the new cam covers,
which are smaller in size and secured by just four screws.
The throttle bodies have also been totally redesigned. On the mechanical
side, the 50 mm throttle bodies, brackets, linkages and pulley are all
new. In the electrical and electronic systems, the advanced 12-hole IWP
189 injectors, the potentiometer and the stepper motor for automatic
idling speed control are also new.
The engine delivers an amazing 130 HP at 9500 rpm, with torque peaking
at 10.6 kgm at 7500 rpm. The smooth and progressive power delivery from
this engine makes the Monster S4Rs a real pleasure to ride. The
Testastretta’s vital statistics include a stroke of 63.5 mm and a bore
of 100 mm. The inlet valves are 40 mm in diameter and the exhaust valves
33 mm. Valve lift is 11.71 mm for the inlet valves and 10.13 mm for the
exhaust valves.
Style and finish
The Ducati Monster S4Rs is not just another sports
bike, nor a mere superbike without a fairing. It could be called “super-naked”,
packed with parts and solutions taken directly from the world of
motorcycle racing.
The trellis frame, central to the appeal of the Monster family,
has been made even more beautiful by eliminating all the small wire ties
and more thoughtful routing of the electrical cables.
The large number of components formed in carbon fibre
demonstrates how much attention Ducati has paid to getting even the
smallest details right. The front mudguard has been redesigned specially
for the S4Rs, as have the radiator guards, timing belt covers, side
panels and exhaust system heat shields for the secondary collector pipes
and top silencer.
The looks of the S4Rs are enhanced by original new graphics.
A brand new logo has been conceived to emphasise the
exclusiveness of the bike. You can find it on the top of the tank, on
the new instrument panel graphics and on the aluminium inserts of the
side panels. The fuel tank, fairing and seat cover graphics are new too.
The longitudinal stripe that has always characterised the SR range of
the Monster family is far broader and has moved to the bike’s centreline,
where it runs down the nose fairing, tank and seat cover. A
great deal of care has been taken in selecting the bold new
colour schemes for the new S4Rs. You can choose from
three alternative finishes: original new pearl white with red
stripe, with red frame and white wheels; quintessential
Ducati red with white stripe, with red frame and black wheels;
and aggressive gloss black with light grey stripe, with
black frame and black wheels. The unique swingarm is finished in black
on all three versions.
Even the brakes contribute to the S4Rs’ stunning looks: the
brake calipers have the Brembo logo milled into them, and then the logo
is finished in red paint to create a front end worthy of a true
racer.
The care and attention dedicated to the finish of this super-naked even
extends to parts that are often considered of secondary importance. Take
the cooling system for example. The radiator has a new
shape to accommodate new, more elegant bullet shaped fans, and is
protected at the sides by two carbon fibre guards. The pipe that runs
from the radiator to the coolant pump is in aluminium rather than rubber.
And the oil cooler fixed to the horizontal cylinder head has a new
trapezoid shape.
There is even one new technical solution that might easily go
unnoticed. Though identical in appearance to those of all other
SR Monsters, the fuel tank is completely new and boasts a bottom profile
that has been thoroughly redesigned to house a brand new, ultra-compact
fuel pump.
TECHNICAL SPECIFICATIONS
|
DUCATI MONSTER S4Rs Testastretta |
|
Engine |
|
|
Type |
L twin cylinder, 4 valve per cylinder
Desmodromic, liquid cooled |
|
Displacement |
998 cc |
|
Bore x Stroke |
100 x 63.5 mm |
|
Compression Ratio |
11.4:1 |
|
Power |
95.7 kW - 130 HP @ 9500 rpm |
|
Torque |
103.9 Nm - 10.6 Kgm @ 7500 rpm |
|
Fuel injection |
Marelli electronic fuel injection, 50 mm
throttle body |
|
Exhaust |
2 aluminium mufflers |
|
Emissions |
Euro 3 |
|
Transmission |
|
|
Gearbox |
6-speed |
|
Ratio |
1st 37/15, 2nd 30/17, 3rd 27/20, 4th 24/22,
5th 23/24, 6th 24/28 |
|
Primary drive |
Straight cut gears; Ratio 1.84 |
|
Final drive |
Chain; Front sprocket 15; Rear sprocket 43
|
|
Clutch |
Dry multiplate with hydraulic control |
|
Chassis |
|
|
Frame |
Tubular steel trellis frame |
|
Wheelbase |
1440 mm / 56.7 in |
|
Rake |
24° |
|
Front suspension |
Ohlins 43 mm fully adjustable upside-down fork
with TiN |
|
Front wheel travel |
130 mm / 5.1 in |
|
Front wheel |
Y-shaped, 5-spoke in light alloy 3.50 x 17
|
|
Front tyre |
120/70 ZR 17 |
|
Rear suspension |
Progressive linkage with fully adjustable
Ohlins monoshock. Aluminium single-sided swingarm |
|
Rear wheel travel |
148 mm / 5.8 in |
|
Rear wheel |
Y-shaped, 5-spoke in light alloy 5.50 x 17
|
|
Rear tyre |
180/55 ZR 17 |
|
Front brake |
2 x 320 mm discs, 4-piston 4-pad radial
caliper |
|
Rear brake |
245 mm disc, 2-piston caliper |
|
Fuel tank capacity |
14 l (of which 3 l reserve) / 3.5 US gal (of
which 0.8 US gal reserve) |
|
* Dry weight |
177 Kg /
390 lbs |
|
Seat height |
805 mm / 31.5 in |
|
Max height |
1222 mm / 48.1 in |
|
Max length |
2121 mm / 83.5 in |
|
Instruments |
Electronic panel: speedometer, rev counter,
warning light for low oil pressure, indicators for high beam,
fuel reserve, turn signals, LCD clock, immobilizer |
|
** Warranty |
2 years unlimited mileage |
