Ducati ST4s — Wikipedia, the free encyclopedia

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Ducati ST2

Ducati ST4s


[ edit ]

The ST4S was based on the ST4. which used a version of the Ducati 916 engine. to the ST4, the ST4S had improved and a larger engine, using the Desmoquattro (four desmodromic ) 90° V-twin engine based on the 996. The Desmoquattro was largely from the 996 Superbike, and retained a angle of 40°, but lost 4mm of on each of the intake throttle (down from 54mm on the

Chassis clearances also the use of the more compact cylinder design that was shared the 748 Superbike and Monster S4. In spite of the intakes, the ST4s actually slightly more power and than the 996 Superbike due to the mostly design of the ST’s exhaust, to the under-seat exhaust of the Superbike.

Otherwise it was a competent trellis sports tourer with a fairing. and standard colour luggage (luggage was optional on ST series models). The ST came with a center-stand, an accessory outlet, and both the ST4s and could also be equipped ABS from 2003.

In 2004, an to the ST line brought a slightly nose fairing and dashboard, ergonomics, a trip computer, (hazard) flashers, digital a dashboard-controlled adjustable headlight, a new design, Euro-2 catalytic (except USA — Euro-3 was in the 2006 ST3), and a simplified wiring setup. The refinements weight by 11kg (24lb) due to the wiring harness and simpler structure for the nose of the bike.

The trip computer, which was from 2004, could the following:

Total trip

Average speed

Average economy

Instantaneous fuel

Fuel consumed (in units)

Fuel (in units)

Distance to

Clutch [ edit ]

In 2004 and Ducati added a wet clutch to models, including the ST series in This reduced the force to engage the clutch. [ 1 ] [ 2 ]

Specifications [ edit ]


Transverse, liquid-cooled 90° V-twin, DOHC. desmodromic 4V, 996cc.

x …: 98.0mm ×66.0mm ×2.60in).

Compression ratio:

Power (Ducati changed to an inertial dynamometer. from a version, to rate power and in 2005. However, the engine unchanged):

2002-2004: 86kW at 8,750rpm.

2005 only: (119hp) at 8,750rpm.


98N·m (72.3lb·ft) at 7,000rpm.

only: 102.9N·m (75.9lb·ft) at

Maximum engine speed limited): 10,000 rpm.

Marelli electronic fuel-injection two 50mm throttle bodies.

Ignition: Electronic, single spark plug per cylinder.

Electric with anti-theft using a chip embedded in the


Six-speed gearbox chain final drive:

ratios: 1st 37/15, 2nd 30/17, 3rd 4th 24/22, 5th 23/24, 6th 24/28.

drive ratio: 1.84:1.

drive ratio: front 15T, rear sprocket


2002-2004: Hydraulically dry multiplate clutch.

2005: actuated wet multiplate clutch.

Top 259km/h (161mph).

Ducati ST2

Chassis and

Wheelbase: 1,430mm (56.3in).

height: 820mm (32.3in).

Weight (dry):

2002-2003: (467lb).

2004-2005: 201kg


Front: 43mm inverted cartridge forks, adjustable for preload, compression and damping.

Rake: 24°

Rear: monoshock adjustable for preload, and rebound damping.

ST4s-specific boxed aluminum swingarm.

and 2003 models had a factory-installed rear mudguard. Other used an ABS-plastic part.

brakes and tyres

Wheels: cast Aluminum, Marchesini

Front: 3.50 x 17.

Rear: x 17.

Brakes (ABS optional

Front: Twin 320mm with Brembo four-pot piston callipers.

Rear: Single 245mm with Brembo twin-pot piston calliper.


120/70 ZR17 Michelin Sport tubeless.

Rear: ZR17 Michelin Pilot tubeless.

Ducati ST2
Ducati ST2
Ducati ST2

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