Please note: This bike is a part of the Northern California Superbike Collection. The anonymous owner is well-known and a long-term friend of both Iconic and Bike-urious. All proceeds will go towards a foundation he and his wife run to further research for sustainable agricultural and agroforestry systems worldwide.
Debuting in 2001, the Monster S4 was lightning in the bottle for an outdated Monster lineup. Previously, Ducati enthusiasts had not seen a significant update (or even a facelift) since the mid 90s. The powerplant was a 916 V-twin engine, providing enough low-end grunt for the daily rider, while revving high enough to spirit one to adrenaline-inducing speeds.

The S4 offered improved suspension over previous models, as well as increased ground clearance, allowing for a sportier approach to the naked bike. The new Monster boasted a respectable power output, making 97hp and 64lb-ft of torque. These numbers, combined with more premium features that came stock — such as Brembo brakes, Showa suspension, and carbon fiber bits spread throughout the chassis — gave the motorcycle an air of quality that was refreshing in the outdated Monster lineup.

According to Motorcycle.com “The idea behind the S4 was simple: stuff the all-conquering superbike engine from the 916 into a Monster chassis and create a Ducati that lives up to the name stamped on the gas tank.”

This example is VIN: ZDM1RB8S51B000257.


The odometer shows 7,701 miles.

Maintenance:
In preparation for the listing, the seller had us perform a safety inspection, we changed the oil and filter, cleaned, lubed, and adjusted the chain, performed a hydro flush/fill, coolant flush/fill, replaced the battery, rebuilt the fuel pump assembly, and replaced the air filters. Our service department notes the following on their condition report:
Gas Tank Internal Condition: Ok
Engine Oil Level: Ok
Engine Oil Quality: New
2T Oil Level:
Coolant Level: Ok
Coolant Quality: New, <150 mV
Front Hydraulic Fluid Level: Ok
Front Hydraulic Fluid Quality: New, <1.5% Moisture
Rear Hydraulic Fluid Level: Ok
Rear Hydraulic Fluid Quality: New, <1.5% Moisture
Clutch Hydraulic Fluid Level: Ok
Clutch Hydraulic Fluid Quality: New, <1.5% Moisture
Final Drive Condition: Ok
Headlight High Beam: Ok
Headlight Low Beam: Ok
Passing Light: Ok
Parking Light: Ok
Turn Signals: Ok
Tail Light: Ok
Brake Light (Front Switch): Ok
Brake Light (Rear Switch): Ok
Plate Light: Ok
Horn: Ok
Kill Switch: Ok
Brake Pad % Remaining Front: 80%
Brake Pad % Remaining Rear: 70%
Forks: Ok
Shock/s: Ok
Tire Date Code Front: 22/13
Tire Date Code Rear: 23/13
Tire % Remaining Front: 80%
Tire % Remaining Rear: 80%
Tire Press. Front: 36 PSI
Tire Press. Rear: 38 PSI
Battery Standing Voltage: 13.27V, New Battery
Charging Voltage @ 4k RPM: 13.51V
Running Condition: Ok, runs on bench
Test Ride Completed: Yes
Test Ride Distance: 2 Miles, unit operates as designed
Tires Installed:
– FRONT- 120/70-17
– REAR – 180/55-17
Notes:
– New Battery
*Aftermarket Parts Installed:
– CARBON FRONT FENDER, CARBON –REAR HUGGER
– AFTERMARKER RESEVOIR CAPS
– REMUS CARBON EXHAUST CANS
– AFTER MARKET MIRRORS
– CORBIN SEAT
– CLUTCH SLAVE CYLINDER
– FRONT SPROCKET COVER
RECCOMENDED REPAIRS:
– TIRES
Aftermarket reservoir caps and anodized mirror perches.



Carbon fiber front and rear fenders.


Aftermarket carbon style mirrors.

Carbon fiber clutch and case covers.

It is riding on Dunlop Sportmax Q3 tires which have aged out with date codes of 2213 and 2313.


Cosmetic Blemishes: please see the album in the “Photos” tab for all known cosmetic blemishes. Here is a selection:






Currently located in Panorama City, California, (please make an appointment for an inspection) this Ducati is offered on a clean California title with registration that will cost $155 to bring current through August 2026.

Have any Monster S4 stories or questions about this listing? Let us know in the “Comments” tab!








