KTM AND DUCATI

  

The Streetfighter’s Superbike soul combines fighter attitude and naked sophistication to create pure adrenaline. ‘S’ treatment of the Streetfighter pushes its tech spec to the red line.

ENGINE
The world-beating 1098 Testastretta Evoluzione needs little introduction. Debuting in 2007, it went on to form the basis of a motor that powered Ducati to Superstock and Superbike World titles that left the competition stunned. Now, its massive bore, short stroke and incredible torque powers Ducati’s most extreme naked and the results are equally as stunning. Producing a ballistic 85lb-ft (11.7kgm) of torque and 155hp (114kW), the Streetfighter’s awesome 1098 power house fears nothing of the naked sports competition. The L-Twin, Testastretta Evoluzione engine gives both the best power-to-weight and the best torque-to-weight ratios in its class.

The incredible valve performances of our engines are only possible because of Ducati's unique Desmodromic system, where valve closure is activated mechanically. At high rpm it would be almost impossible for the valve to follow the steep closure profile of the cam lobe if it were relying upon a normal valve spring. With the Desmo system, the valve is closed mechanically with the same accuracy as it is opened, enabling steep cam profiles and radical cam timings. This system is used on every single Ducati power unit including our world-beating Superbike and Desmosedici MotoGP engines.

The streetfighter's lightweight crankshaft assembly operates a highly ‘over-square’ bore and stroke with huge 104mm pistons powering through short 64.7mm strokes.

The Vacural® casting process used to make the Streetfighter crankcases ensures consistent and precise wall thickness and increased strength from absolute material purity while reducing weight an incredible 3kg (6.5lb) compared to those of the 1098 Superbike engine.

Attention to weight reduction is further underlined with both cam covers and clutch outer cover cast in manesium alloy.

The Streetfighter engine is fed by MotoGP-derived elliptical throttle bodies which are equivalent to a diameter of 63.9mm. Representing a 30% increase in air flow over conventional throttle bodies, the elliptical shape contributes considerable a power increase. The Ducati 1098 engine was the first in the range to introduce this MotoGP technology for street use.

The Streetfighter’s power house is protected by twin coolant radiators, carefully curved in pure naked style for optimum performance and stunning with visual effect. The upper radiator is assisted by lightweight, high flow electric fan assemblies while the lower sits in the front of the belly pan, which also houses a highly efficient oil heat exchanger.

The massive 2-1-2 exhaust system is made from weight-saving 1mm thick steel and flows from 58mm to 63.5mm diameter pipes. The system uses two lambda probes to ensure precise fuel mapping for optimum performance and an electronic valve in the mid-section to achieve a wide spread of power. The cannon-style, vertically stacked, brushed steel mufflers deliver the famous Ducati L-Twin sound synonymous with raw, Desmo power.　

CHASSIS
The single-sided swingarm is 35mm longer than the Superbike to ensure the Streetfighter’s acceleration need never be compromised. The longer, beautifully created aluminium swingarm follows the same dual construction detail as the Superbike models and is anodised finished in black

 The Streetfighter S pushes the spec way up with 43mm Superbike-spec öhlins forks that have sliders treated in low-friction TiN. Fully adjustable in spring preload and precisely adjustable in compression and rebound damping, they ensure ‘S’ feeling and finesse when the fight gets rough.

The purpose-built trellis frame uses 25.6° of rake compared with the Superbike’s 24.5° to ensure a well-planted front-end.

The Streetfighter S uses Brembo’s powerful Monobloc calliper race technology. Machined from a single piece of alloy, the callipers achieve higher rigidity and resistance to distortion during extreme braking. The result not only delivers planet-stopping brake power, but also gives an enhanced and precise ‘feel’ at the brake lever. The twin Monobloc callipers each have four 34mm pistons that grip huge 330mm discs to achieve their spectacular performance. The weight of the discs has been kept to a minimum by using racing-style narrow braking surfaces.

 Taking care of the rear of the ‘S’ is a single high-spec öhlins unit fully adjustable in spring preload with full adjustment and highly engineered control of compression and rebound damping. The unit is also fitted with a ride enhancing top-out spring which helps maintain rear tyre contact under extreme conditions.

 The Streetfighter S reduces weight even further by using Y-shaped, 5-spoke wheels by Marchesini, forged and then machined in lightweight aluminium. The Streetfighter S wheels are finished in bronze.  　

EQUIPMENT
The Streetfighter’s instrumentation blends into the aggressive line of the headlight. Information additional to the default read-outs is managed from the left-hand handlebar-mounted switch gear, allowing the rider to scroll through and select from various menus. The display presents rpm and speed, with the former displayed across the screen in a progressive bar graph. Additionally, the instruments display lap times, DTC status and level selected (if activated on Streetfighter S) time, air temperature, coolant temperature, battery voltage, two trips and a trip that automatically starts as the fuel system goes onto reserve. Warning lights illuminate to signify neutral, turn signals, high beam, rev-limit, low oil pressure, fuel reserve, DTC intervention (if activated on Streetfighter S) and scheduled maintenance. The instrument display is also used as the control panels for the DDA and DTC systems as well as listing lap times recorded by using the high-beam flash button as a stopwatch.

The digital display is programmed with a stopwatch function that, when enabled, can be triggered by using the high-beam flash button and each recorded time stored in a memory. After your journey or track session, the times or lap times can be recalled from the memory and scrolled through by using the instrumentation buttons on the left-hand switchgear. The instrument display also doubles as a control panel for the activation of the Ducati Data Analyser (DDA) system, which is available as an accessory from Ducati Performance. The bike has been built ‘system-ready’ for the data acquisition kit, which consists of special DDA software and a memory key that slots into a plug under the seat. The same plug also doubles as the connection for a handy new battery charger available as an accessory from Ducati Performance.

The aggressive looking headlight is the ‘face’ of the Streetfighter and it leaves little doubt as to its character. While the main lighting source and multi-reflector design provides powerful illumination to cut through the night, its two evil eye strips of LED positioning lights give a striking and unmistakable identity to the bike.

Keeping design matters clean and stylish, the directional indicators remain unobtrusive with clear lenses and coloured bulbs, while the rear light is integral to the shape of the tailpiece, providing unobscured illumination while maintaining the smooth and elegant look to the high and sharp rear-end.

The handlebars are gripped by beautifully shaped clamps that flow sleekly into the bar-risers. Symmetrically mounted, remote brake and clutch reservoirs are small, low and compact and feed slim, radial master-cylinders by Brembo to complete the clean and uncluttered controls arrangement.

The switchgear presents minimalism at its best. The slim-line bodies house easy-to-use switches and buttons and feature a unique weapons-like ‘trigger catch’ that slides down to cover the starter button when activating the kill-switch.
Accessible from the left-hand switchgear and displayed on the digital instrumentation, Ducati Traction Control (DTC) offers a choice of eight profiles, or ‘sensitivity levels’, each one programmed with a wheel-spin tolerance matched to progressive riding levels of skill, graded from one to eight.
While level eight administers a confidence-building, high level of interaction from the system by activating upon the slightest amount of wheel-spin, level one offers a much higher tolerance, resulting in less intervention for highly competent riders
Once the level is selected and DTC activated, both are displayed on the instrumentation. The system then analyses data sent from front and rear wheel speed sensors to detect wheel-spin. Should the system recognise wheel-spin above a certain threshold, the DTC ECU instantly evaluates the many possible wheel-spin scenarios before administering two types of interaction in varying amounts.
DTC is able to sense the exact use that the bike is being put to. From slow mid-corner acceleration with considerable vehicle inclination to high speed corner exits while almost upright, DTC is intelligent enough to react according to each and every situation. It’s even smart enough to not intervene if you decide to perform a burnout or a wheelie.
The first ‘soft’ stage of system interaction is executed by high speed software that instantly makes electronic adjustment to the ignition by administering varying amounts of retardation to reduce the engine’s torque output.
During this initial stage of DTC interaction, both outer warning lights on the instrumentation – normally used to signify over-rev – illuminate to signify that DTC is being applied.
If the DTC software detects that the first ‘soft’ stage of system interaction is inadequate to control the wheel-spin, it continues to administer ignition retardation and instructs the engine ECU to initiate a pattern of constantly increasing injection cuts until, if necessary, full injection cut. During this second stage of system interaction, both outer and central warning lights fully illuminate to signify that DTC has also initiated injection cuts.
After either stage one (ignition retardation) or stage two (pattern of injection cuts or full cut), the system incrementally returns to the original ignition and injection mapping as the wheel speeds approach equalisation. This carefully programmed return to full power delivery is the real key to DTC’s smooth and efficient operation.
In developing its World Championship-winning traction control system for road use, Ducati continue to demonstrate their strategy of transferring technologies from their race bikes into the production environment, and show how solutions developed for performance on the track really can be applied to enhance safety on the road.

The perfectly formed passenger seat cover is one of the finer details contributing to the Streetfighter's high level of finish.

The Ducati Data Analyser (DDA), which includes PC software, a USB-ready data retrieval card and instructions, enables you to review and analyse your performance and that of the bike's, and to make comparisons between various channels of information.
The system records numerous channels of data including throttle opening (A), vehicle speed (B), engine rpm (C), engine temperature (D), distance travelled (E), laps and lap times. It also automatically calculates engine rpm and vehicle speed data, enabling it to display gear selection (F) as an additional channel of information. An additional channel of information is now dedicated to recording the DTC index (G) which can then be viewed as a graphic trace and indicates the amount of DTC interaction during wheel-spin (Subject to model).
At the end of a ride or track session, up to 4mb of data can be downloaded ready to compare, analyse and get an inside view of the performance of both you and the bike.

Carbon fibre front fender and cam belt covers not only shave additional weight, they also contrast superbly against the bronze finish of the frame.