Ducati MONSTER 821 /STRIPE (EURO 4) (2017) — Specs
Identity
Manufacturer: Ducati
Model: MONSTER 821 /STRIPE (EURO 4)
Category: Naked
Type: Motorcycle
Years: 2017 → 2017
Engine
Displacement (cc): 821
Cylinders: 2
Power (hp): 109
Power (kW): 80
Torque (Nm): 86
Dimensions
Overall length: 2080 mm
Overall width: 845 mm
Overall height: 1110 mm
Wheelbase: 1480 mm
Ground clearance: 135 mm
Weight (kg): 206
Seat height (mm): 785
Tank (L): 17.5
Tires
Front tire: 120/70 ZR17
Rear tire: 180/55 ZR17
Front pressure (bar): 2.5
Rear pressure (bar): 2.5
Drivetrain
Drive chain: 525 chain, 108 links
Sprockets (front / rear): 15 / 46
Ignition
Spark plug: NGK MAR9A-J
Fluids & Filters
Engine oil: SAE15W-50, API SM
Engine oil (with filter, L): 3.2
Oil filter: Hiflofiltro HF153
Air filter: Hiflofiltro HFA6101
Coolant (L): 2.5
Brake fluid: DOT 4
Fuel consumption
Manufacturer / WMTC: 5.5 L/100 km
Real-world range: ~318 km on a full tank (17.5 L)
Note: real-world ±15-30% depending on riding style
Service
Battery: YTX12-BS
Service interval (km): 15000
Service interval (months): 12
Valve check (km): 30000
Parts and consumables for this motorcycle
Data is gathered with care, but without guarantee. Always confirm critical information with your dealer or workshop.
Service notes
Service interval: every 15,000 km or 12 months, whichever comes first. Valve clearance check every 30,000 km. Engine oil: oil grade SAE15W-50, API SM, 3.2 L with filter change. Spark plug: NGK MAR9A-J. Brake fluid: DOT 4. Coolant capacity: 2.5 L. Chain: 108 links, sprockets 15/46 teeth. Tire pressure: front 2.5 bar, rear 2.5 bar (cold). Tire size: front 120/70 ZR17, rear 180/55 ZR17. Always confirm critical values with the workshop manual or an authorised dealer.
OEM and quality aftermarket parts that fit this bike. Always confirm with your dealer before ordering.
Engine oil
Spec: SAE 15W-50, 3.7 L (with filter)
- OEM OEM recommended engine oil (SAE 15W-50)
- Premium Motul 7100 4T (100% Synthetic, Ester)
- Premium Motul 5100 4T Technosynthese (Semi-Synthetic)
Which Motul for this bike?
| Motul 7100 4T ✓ | Motul 5100 4T | |
|---|---|---|
| Product | Motul 7100 4T — 100% fully synthetic | Motul 5100 4T — semi-synthetic |
| Best for | Sport, Naked, Adventure (600cc+), track | Standard, Cruiser, Scooter, daily use |
| RPM protection | Excellent — ester base, stable under load | Good — for normal riding conditions |
- Premium Liqui Moly Motorbike 4T
- Standard Repsol Moto Racing 4T (Synthetic)
- Standard Elf Moto 4 Tech (Semi-Synthetic)
- Standard TotalEnergies Quartz Moto 4T
Fully Synthetic vs Semi-Synthetic
| Fully Synthetic | Semi-Synthetic | |
|---|---|---|
| Base oil | 100% chemical synthesis (ester or PAO) | Mineral oil + synthetic additives |
| Heat resistance | Excellent — stable at extreme heat & RPM | Good — suitable for normal temperatures |
| Cold start | Better — reaches engine faster when cold | Good — adequate for normal climates |
| Change interval | Longer (up to 10,000 km) | Shorter (5,000–7,000 km typical) |
| Price | Higher | Lower |
Oil filter
Spec: Hiflofiltro HF153
- Premium Hiflofiltro HF153
- Premium K&N KN-153
Air filter
Spec: Hiflofiltro HFA6101
- Standard Hiflofiltro HFA6101
Spark plug
Spec: NGK MAR9A-J, gap 0.7-0.8 mm
- OEM NGK MAR9A-J
- Premium NGK MAR9A-J
- Standard NGK MAR9A-J
Front brake pads
Spec: OEM front pad (EBC equivalent: FA630HH)
- Premium EBC FA630HH
- Standard EBC FA630 (organic)
Rear brake pads
Spec: OEM rear pad (EBC equivalent: FA266HH)
- Premium EBC FA266HH
- Standard EBC FA266 (organic)
Drive chain
Spec: 108 links | Sprockets 15/46 teeth / 108 links
Front sprocket
Spec: 15 teeth
Rear sprocket
Spec: 46 teeth
Front tire
Spec: 120/70 ZR17, 2.5 bar
- OEM OEM front: 120/70 ZR17
Rear tire
Spec: 180/55 ZR17, 2.5 bar
- OEM OEM rear: 180/55 ZR17
Battery
Spec: OEM battery: Yuasa YTX12-BS
- OEM OEM battery: Yuasa YTX12-BS
- Premium Yuasa YTX12-BS
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Spec: 2.50 L coolant capacity
Service interval
Spec: 15 000 km / 12 months
- OEM Engine oil + oil filter change
- OEM Air filter inspection
- OEM Spark plug check
- OEM Brake fluid replacement: every 2 years
Valve check
Spec: 30 000 km
- OEM Desmodromic valves — specialist service
Suspension
Spec: 43 mm USD fork / L 394/R 521ML 7.5W
- OEM Fork: 43 mm USD fork
- OEM Fork oil grade: L 394/R 521ML 7.5W
