As Ducati’s superbikes evolved, so too did the Monster lineup. But by the middle-aughts, the Italian marque was facing increasingly fierce competition from fellow European manufacturers like Triumph and KTM. So in 2006, Ducati shoehorned the powertrain from its 998 superbike into the Monster. Two years later, Ducati one-upped itself, this time delivering what was essentially a naked version of its World Superbike Championship-winning 999 model.
Dubbed the S4RS, the naked was powered by Ducati’s Testastretta 998cc engine. The water-cooled narrow-head motor featured Marelli FI with competition-derived 12-hole injectors and an auxiliary oil cooler. The race-bred L-Twin redlined at 10,500 rpm, putting down 130 hp at 9,500rpm and 77 ft-lbs of torque at 7,500rpm. Despite being housed in Ducati’s trademark tubular trellis frame, the company’s designers did a stellar job of hiding the model’s slew of wiring and sensors so they could highlight the crown jewel of the bike: the engine.
The 390lb (177kg) S4R S also boasted an array of competition-grade componentry, much of it borrowed from the R-spec 999. 43mm inverted Öhlins forks with low-friction titanium nitride coating, Öhlins monoshock, aluminum single-sided swing-arm, four-pot Brembo P34 brakes with dual 320mm discs, and forged ten-arm alloy Marchesini rims were all standard fare on the hopped-up naked.
This example is VIN: ZDM1RB5T27B089050. The seller acquired this bike from Moto A2Z in Mesa, Arizona 8 months ago.
During his ownership, the seller has covered 11 miles. The odometer shows 5,366 miles.
It is US and California emissions compliant.
“I own too many to keep this – have another 2007 S4RS with 10K mi, a 2012 Multistrada Pikes Peak, 2022 Multistrada V4 Pikes Peak, and numerous BMWs. The S4RS I am selling is super clean and low miles – I bought it after I bought another S4RS on Iconic, which I put a lot of time and effort into cleaning up, so selling this one is not as emotional.”
Maintenance:
New battery installed 10-23-25.
He notes that there are no known mechanical issues however it is unknown when the belts were last replaced.
The tank shows signs of bubbling/expansion under the tank protector.
The seller confirms: “Tank fits fine, it really is not swollen compared to my other S4RS for reference, did not need to use most of the adjustment available on the new hinge. I took photos showing the front clasp with plenty of clearance, and the tank is not backed up into the seat.”
Modifications:
Termignoni dual exhaust.
Paulimoto clutch cover.
Tail tidy kit.
Fly screen windshield, bar end mirrors.
Battery tender lead.
Pro Grip tank protector.
Inside of the tank:
It is riding on Michelin Pilot Power tires with date codes of 5010 and 2311.
The sale includes two black keys, the red key, code card, Owner’s Manual, World Dealer Guide, tool kit and additional items from when the bike was new.
Cosmetic Blemishes: please see the album in the “Photos” tab for all known cosmetic blemishes. Here is a selection:
“Very minor scratch on tailpiece, slight corrosion on front brake fluid cover.”
Currently located in Concord, California, this Ducati is offered on a clean Montana title.
Have any Monster S4RS stories or questions about this listing? Let us know in the “Comments” tab!
