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2007–2008 · Naked Bike · Buyer's Guide
Superbike Soul, Street Naked
The S4R Testastretta sits at the top of the liquid-cooled Monster line. Its 998 cc L-twin makes 130 hp and 76 lb-ft, wrapped in a steel trellis frame with a single-sided swingarm and fully adjustable Showa and Sachs suspension. This is the Monster carrying real superbike hardware under the naked silhouette. Twin under-seat pipes, upright bars, and a 439 lb wet weight give it genuine presence without bulk. It reads as pure Ducati: emotional, technically dense, and built to be looked at as hard as it is ridden.
On the road it rewards a rider who wants to be involved. The torque arrives early and the chassis talks back, so this is a bike for the experienced hand who values character over convenience and is comfortable riding with no ABS and no traction control. The honest caveat is age. Higher-mileage examples can develop soft valve guides and start burning oil, so buy on condition and service history, not just on looks. Maintained with respect, it stays as special as it looks parked outside a café.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 130 hp (96 kW) @ 9,500 rpm |
|---|---|
| Torque | 76 lb-ft (103 Nm) @ 7,500 rpm |
| Displacement | 998 cc |
| Engine | L-twin |
| Cooling | Liquid-cooled |
| Gearbox | 6-speed |
| Final drive | Chain |
| Fork | Upside-down (USD) |
| Front brake | 320 mm |
| Front tire | 120/70-17 |
| Rear tire | 180/55-17 |
| Wheelbase | 56.7 in (1440 mm) |
| Seat height | 31.6 in (802 mm) |
| Wet weight | 439 lb (199 kg) |
| Fuel capacity | 3.7 gal (14 L) |
Equipment check
Chassis
Thumb the starter and the L-twin settles into that hard, uneven idle only a big Ducati twin makes, and the pipes tucked under the seat give it a deep mechanical voice you feel as much as hear. There is real texture through the pegs and bars at low rpm, the kind of pulse that reminds you what sits between your knees. The riding position is sporty but honest: a 31.6 in seat, a short reach to the bars, and enough room to shift your weight. At 439 lb it feels light and eager to change line once you are rolling. With no fairing, the wind builds fast, and by the time you reach a real road pace it presses on your chest and makes 60 mph feel like an event. That wind is the S4R keeping you honest and grinning at the same time.
The material here didn't come from a single ride. Nils has collected it over years: reading through long rider discussions, talking with owners at events, trading messages back and forth, and sorting the reports that land in his mail. On the S4R the community settles into a clear pattern.
The Testastretta motor dominates the talk. Owners describe a surge of power and a deep exhaust voice that turns each ride into an occasion, pulling hard through the midrange and revving out with appetite. The brakes draw nearly as much praise, credited with real stopping force and the feel to lean on them. The chassis earns steady respect too, a communicative setup riders trust to read the road and stay sharp as the pace lifts.
The complaints cluster around everyday use, and comfort leads. The firm sport suspension passes rough pavement straight through, and it tires riders over distance. A few point to the small tank that keeps fuel stops close together. Others note throttle that turns snatchy at low revs around town, and taller riders who find the cockpit tight.
Soft valve guides leading to oil consumption
The 998 Testastretta engine can suffer from premature valve guide wear, resulting in increased oil consumption and blue smoke on startup. This is a known issue on higher-mileage examples.
Rectifier/regulator failure
The voltage regulator/rectifier can overheat and fail, especially when mounted under the seat with limited airflow. Symptoms include battery charging problems and, in severe cases, a dead engine.
Clutch slave cylinder leak
The clutch slave cylinder is prone to internal seal failure, allowing air into the hydraulic system. This results in a spongy lever feel and difficulty disengaging the clutch.
Fuel tank expansion due to ethanol
The plastic fuel tanks on many Ducati models of this era are prone to swelling and distortion when exposed to ethanol-blended fuels, potentially causing fitment issues with the tank panels.
Where this Ducati Monster S4R pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Wet weight
Seat height
Forget spec-sheet bragging. Here's who the Monster S4R is actually built for.
If your weekends run from LA traffic to Angeles Crest, the S4R has the torque and the lean clearance to reward a skilled hand. Just accept a raw, unassisted bike and buy a clean one.
Made for Angeles Crest Highway · Coronado Trail / US 191 · Highway 1 / Big Sur
Right at home on spirited Hill Country weekends, with an Italian soul to match the lifestyle. It is a sporty naked, not a tourer, so pack light and enjoy the pull and the sound.
Made for Austin / Texas Hill Country · Twisted Sisters · Austin / Handbuilt Motorcycle Show
For working corners on the Dragon or the Blue Ridge, its light steering and communicative chassis suit skill-over-speed riding. With no rider aids, the precision is all on you.
Made for Back of the Dragon · Blue Ridge Parkway · Cherohala Skyway
If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
