Ducati Monster S4r
The Ducati Monster S4r has a top speed of 240 km/h, produces 113 hp and weighs 192 kg. Motoryk rates it 7.8/10.
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
Video Review
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.
Generations & Specs by Year
Introduced 996cc Desmoquattro engine from 916, Ohlins suspension, single-sided swingarm, 113hp.
"The Monster that finally had enough engine to match its looks."
Ducati dropped the 996 Desmoquattro into the Monster chassis and created something genuinely dangerous in the best possible way — that engine pulls so hard from 4,500 rpm that you're suddenly doing licence-losing speeds before you've consciously decided to accelerate. The Öhlins suspension is a genuine game-changer over earlier Monsters; it actually holds a line instead of wallowing, and the single-sided swingarm makes tyre changes almost enjoyable. Honestly though, the heat management is brutal — summer city riding means your right leg is slow-cooking against the exhaust side, and the dry clutch rattle at idle makes every parking lot feel like a performance. Reliability is the real caveat: desmo services every 7,500 miles aren't cheap, and if you've bought one with deferred maintenance, budget accordingly before you fall in love.
Pros
Cons
Updated to 998cc Testastretta engine, revised chassis, improved brakes, increased power to 130hp.
"The naked bike that still makes you nervous."
The 998cc Testastretta hits differently than the old 916-derived unit — there's real midrange grunt now, not just a top-end scream, and it makes city riding genuinely exciting rather than just tiring. Chassis balance is sharper than the S4, the Öhlins suspension actually works without revalving, and Brembo brakes have that immediate, confident bite you stop noticing only because you trust them completely. But let's be honest: the desmo service interval will cost you €600–900 every 15,000 km, the heat between your legs in traffic is genuinely oppressive on hot days, and that seat will end your enthusiasm around the 90-minute mark. This is a bike you ride with intent, not one you casually commute on — treat it that way and it rewards you like few others.
Pros
Cons
Used Buyer Review
"An intoxicating machine for riders who respect their spanners."
$5,500-$9,500 usedThe S4R is essentially a Supermono with an extra cylinder — Ducati's 996 Testastretta engine shoehorned into the Monster chassis, making 113bhp that feels genuinely violent below 4,000rpm. This thing has personality most modern bikes have carefully engineered away. The half-fairing version that arrived mid-run looks menacing and actually works aerodynamically. Riding position is aggressive but manageable for spirited weekend blasts. Here's the honest part nobody tells you: budget aggressively for maintenance. Desmodromic valve services every 7,500 miles run $600-1,000 at a dealer, often more. Check service history obsessively — skipped valve checks are engine death sentences. The dry clutch chatters loudly at idle and slips if a previous owner was ham-fisted. Cooling is marginal in traffic; city riding means hot thighs and occasional fan tantrums. Electrical gremlins, particularly the instrument cluster and immobilizer, are a real used-bike lottery.
Top 10 Accessories
Curated picks for the Ducati Monster S4r — owned, ridden, recommended.
Common Problems
🔥 1 CRITICALAsk for service history, due every 7,500 miles
Look for white residue below pump on engine
Test all lights, dash indicators while running
Listen for rattling, inspect clutch cover plates
✅Pre-Purchase Checklist
High maintenance but rewarding if serviced properly
Full Specifications
Rivals & Alternatives
Bikes that buyers cross-shop with the Ducati Monster S4r

Ducati Monster 821

Ducati Monster 937

Ducati Monster 696

Ducati Monster 796

Benelli Tnt 899
Compare Ducati Monster S4r Side-by-Side
compare_arrowsSpecs, power, weight & buyer verdict — head-to-head with the bikes most often cross-shopped.
Ducati Monster S4r vs Ducati Monster 821
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Ducati Monster S4r vs Ducati Monster 937
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Ducati Monster S4r vs Ducati Monster 696
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Ducati Monster S4r vs Ducati Monster 796
Specs · Power · Buyer verdict
Ducati Monster S4r vs Benelli Tnt 899
Specs · Power · Buyer verdict
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Discussion
Frequently Asked Questions
What are common problems with the Ducati Monster S4r? +
Desmo valve service overdue: Ask for service history, due every 7,500 miles (serious) | Coolant leak from water pump: Look for white residue below pump on engine (moderate) | Electrical gremlins, faulty neutral switch: Test all lights, dash indicators while running (minor)
Is the Ducati Monster S4r a good motorcycle? +
An intoxicating machine for riders who respect their spanners. Rating: 7.8/10. Best for: Experienced riders who wrench and weekend ride. Avoid if: You commute daily and hate surprise bills.
What is the horsepower of the Ducati Monster S4r? +
The Ducati Monster S4r produces 113 hp @ 9,500 rpm, with 103 Nm @ 7,750 rpm of torque. Top speed: 240 km/h.
Is the Ducati Monster S4r good for beginners? +
Yes — the Ducati Monster S4r is a reasonable choice for new riders (113 hp is manageable), weighing 192 kg. Experienced riders who wrench and weekend ride
Is the Ducati Monster S4r reliable? +
Owners report 1 critical issue to watch for on the Ducati Monster S4r, notably: Desmo valve service overdue (Ask for service history, due every 7,500 miles). Buy with a pre-purchase inspection.
Is the Ducati Monster S4r good for daily use? +
Experienced riders who wrench and weekend ride Fuel: 7.5 L/100km (estimated real-world average).
How fast is the Ducati Monster S4r? +
The Ducati Monster S4r reaches a top speed of 240 km/h, producing 113 hp at 192 kg curb weight. Real-world performance depends on rider weight, gearing, and road conditions.
What gear should I buy for a Ducati Monster S4r? +
Motoryk has curated a Top 10 gear list specifically for the Ducati Monster S4r, covering engine oil, tires, chain, battery, and brake pads — see motoryk.com/bikes/ducati/monster-s4r/top10. Each pick is matched to this bike's spec.












