Ducati S4RS Testastretta
The legendary Testastretta engine
now powers the leading street fighter motorcycle.
Designed with the most experienced riders in mind,
who expect the best in terms of technology, performance
and componentry, the Monster S4Rs sets a new standard
in the category, benefiting from all the experience
gained in the World Superbike Championship.
The L-twin Testastretta engine is a milestone
on the historic journey of sports motorcycles.
Testastretta technology allows a reduced angle
between the intake and exhaust valves. The result
is a clean, compact combustion chamber that is
also highly efficient: the flat-crown pistons
provide a perfectly smooth combustion environment
and linear flame front. The special design of
the heads, together with the cutting-edge electronic
engine control system, guarantees optimal combustion
throughout the rev range and makes for smooth,
potent power delivery.
The Testastretta engine features a piston stroke
of 63.5 mm and a bore of 100 mm: the short stroke
limits average piston speed to allow increased
RPMs and improve overall reliability. An exclusive
oil pump feeding system is built into the deep
sump crankcase to ensure an even oil flow rate
during the most dramatic acceleration and braking,
or extreme cornering.
The chassis and running gear on this bike are
unparalleled. The fully adjustable Öhlins
suspension at both ends is complemented by 5 Y-shaped
spoke rims that improve the rigidity/weight ratio
compared to traditional wheels and enable a reduction
of the unsprung weight for better handling. The
320 mm twin disc Brembo brakes on the front have
radial-mounted calipers with four pistons and
four pads. Radial-mounting guarantees a more rigid
caliper-fork mount assembly, thus improving the
efficiency of the brake system.
Several details – the silencer cover, exhaust
heat plate, front mudguard and cam belt covers
are produced in carbon fibre, contributing to
the overall weight reduction and making this Monster
look even more exclusive. Even a top performance
bike such as this can be environmentally responsible,
as the Monster S4Rs Testastretta complies with
the stringent Euro3 emission control standards. |
