Ducati Monster S4r
The Ducati Monster S4R was introduced in 2003 as a high-performance evolution of the Monster S4, featuring the 996cc Testastretta engine derived from the 999 superbike. It received notable updates in 2006 with a revised 998cc Testastretta engine producing increased power and improved chassis components including Öhlins suspension. The S4R is celebrated as one of the most powerful and desirable Monsters of its era, blending naked bike versatility with near-superbike performance.
113 hp
Power
103 Nm
Torque
192 kg
Weight
240 km/h
Top Speed
7.5 L/100km (estimated real-world average)
Fuel
Naked
Body
What Buyers Should Know
Desmo Service Costs
The S4R requires Desmodromic valve adjustments every 7,500 miles, which can cost $600–$1,200 at a dealer. Always verify service history before buying, as skipped intervals can cause serious engine damage.
Heat & Fueling Issues
The S4R is notorious for excessive heat at low speeds and rough throttle response at small openings due to lean factory fueling. A Power Commander or ECU remap significantly improves rideability and is a common upgrade on used bikes.
Strong Collector Appeal
The S4R holds its value well among Ducati enthusiasts due to its rare Testastretta engine borrowed from the 999 superbike, giving it genuine superbike performance in a naked package. Well-maintained examples remain desirable and rarely drop below $5,000–$7,000.
Full Specifications
Rivals & Alternatives
Bikes that buyers cross-shop with the Ducati Monster S4r
