Ducati Monster 821 / Dark / Stealth — OEM Fluid, Tire Pressure & Maintenance Specs
821.1cc Liquid-Cooled 90° L-Twin Testastretta 11° (Trellis Front Frame & Dual Swingarm) · Source: Ducati Monster 821 / Dark / Stealth (2014–2020) Official Owner’s Manual Maintenance Specifications
According to the Ducati Monster 821 / Dark / Stealth (2014–2020) Official Owner’s Manual Maintenance Specifications, the 2014–2020 Ducati Monster 821 / Dark / Stealth (chassis M6/MC/MH) requires 3.2 L (3.38 US qt) of SAE 15W-50 (JASO MA2, API SM / Shell Advance Ducati 15W-50) engine oil for a drain-only change and 3.6 L (3.80 US qt) with filter service (44440291C / HF159). Standard solo cold tire pressure is 250 kPa / 2.50 bar / 36 PSI front (120/70 ZR17 M/C (58W)) and 250 kPa / 2.50 bar / 36 PSI rear (180/55 ZR17 M/C (73W)), paired with 2× NGK MAR9A-J spark plug(s) and a YT12B-BS battery.
Drain only: 3.2 L (3.38 US qt)
R 250 kPa (2.50 bar)
Est. Range: ~305 km (190 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 15W-50 · JASO MA2 · API SM / Shell Advance Ducati 15W-50 |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 3.2 L (3.38 US qt) • With filter/strainer: 3.6 L (3.80 US qt) • Complete dry overhaul: 4 L (4.23 US qt) |
| OEM Oil Filter Code & Type | 44440291C / HF159 |
| Correct Oil Level Check Method | Hold bike upright on level ground 3–5 min after warm shutdown; read crankcase sight glass |
| Oil Drain Bolt Torque | 20 N·m (14.8 lb-ft / 2.04 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70 ZR17 M/C (58W) · Rear: 180/55 ZR17 M/C (73W) (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 250 kPa / 2.50 bar / 36 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| OEM Spark Plug & Quantity | NGK MAR9A-J × 2 (Gap: 0.8 mm) |
| OEM Battery Code & Rating | YT12B-BS (12V 10.0Ah Slim MF AGM) |
| Final Drive Maintenance | 525 Heavy-Duty X-Ring Chain — Maintain 25–35 mm slack and lubricate regularly |
| Brake Fluid & Coolant | DOT 4 · OAT ethylene-glycol coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 821 cc · 109 hp @ 9,250 rpm · 86 N·m (63.4 lb-ft) @ 7,750 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 785 mm (30.9 in) · 206 kg (454 lbs) |
| Fuel Tank & Est. Real-World Range | 16.5 L (4.4 US gal) · ~18.5 km/L → ~305 km (190 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 15,000 km / 15,000 km • Air Filter / Spark Plug: 30,000 km / 30,000 km • Valve Clearance Check: 30,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
2018 refresh added a classic tank latch, color TFT dash, and separate passenger peg brackets; Stealth edition included adjustable KYB forks and DQS.
Oil & Clutch Mechanical Engineering Note
Cable-pulled wet slipper clutch and 821cc Testastretta 11° engine share 3.6 L of SAE 15W-50 JASO MA2 synthetic oil with paper cartridge HF159.