Dedicated Subsystem WorkbenchPlatform Gen: 2014–2026

2019 Ducati Monster / Monster Plus / 821 / 1200 Cylinder Compression & Leakdown Diagnostic Engine

Factory compression specs for 2019 Ducati Monster / Monster Plus / 821 / 1200: standard pressure 165 - 210 PSI (1138 - 1448 kPa), service limit 142 PSI, dry vs wet test diagnostics and acoustic leak stethoscope.

Technical PassportOEM VERIFIED

Engine

937cc

Cooling

Liquid-Cooled

Final Drive

520 (525 on 821 / 1200) Chain

Engine Oil

3.40 L (3.59 US qt)

Spark Plug

NGK MAR9A-J

Front Tire

120/70 ZR17 (Pirelli Diablo Rosso III / IV)

Gen 2014–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2014 through 2026.

Select Model Year:(Active: 2019)
13 Production Years (2014–2026)

2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Cylinder Compression & Leakdown Diagnostic Engine

Multi-Cylinder Dry vs. Wet Test Bench, Differential Pressure Regulator & Acoustic Stethoscope Locator

Ratio: 11.5:1Std: 165-210 PSILimit: 142 PSIWhip Adapter: M10 x 1.0

Diagnostic Presets:

Cyl #1 (Front)IN-SPEC

194PSI(1338 kPa)

Cyl #2 (Rear)IN-SPEC

192PSI(1324 kPa)

Cross-Cylinder Variance: Δ 2 PSI (OEM Limit: ≤ 14 PSI)

VARIANCE IN-SPEC

All cylinders demonstrate strong, balanced mechanical sealing. Piston ring packs, cylinder cross-hatch, and valve seats are within factory specification.

Official Workshop Manual Compression Test Protocol

Step 0 of 5 Completed

Step 1: Engine Operating Temperature

Run engine until coolant reaches 60°C - 80°C (140°F - 176°F). Cylinder expansion brings rings and pistons to true operating clearances.

Step 2: Spark Plug Removal & Port Clean

Blow compressed air around spark plug wells to eject grit, then remove all spark plugs. Thread in M10 x 1.0 whip adapter hand-tight with fresh O-ring.

Step 3: Wide-Open Throttle (WOT) Lock

Hold throttle grip fully wide open (or lock throttle bodies open) to eliminate intake butterfly vacuum restriction and ensure 100% volumetric cylinder filling.

Step 4: Battery Tender Voltage Stabilization

Connect a 12V shop battery tender or booster. Starter must sustain uninterrupted cranking speed (350 RPM) to build maximum dynamic stroke pressure.

Step 5: Crank 4-6 Compression Strokes

Engage starter until gauge needle ceases rising (typically 4 to 6 strokes). Record maximum peak pressure and compare against the OEM limits above.

Official NHTSA Safety Recalls & Technical Bulletins

4 Active Campaigns

U.S. Department of Transportation compliance database (Title 49 U.S.C. Chapter 301).

Verify VIN on NHTSA.gov

The U.S. National Highway Traffic Safety Administration reports 4 safety recall campaigns associated with this platform. Independent repair shops and riders should confirm that authorized dealership warranty remedies have been applied.

NHTSA #21V315000SERVICE BRAKES, HYDRAULIC

Received: 01/01/2021▼

Defect Description

Ducati North America (Ducati) is recalling certain 2017-2020 Monster 797, Monster 1200, Supersport, 2016-2020 XDiavel, and 2018-2020 Monster 821 motorcycles. Air may permeate the rear brake system.

Safety Hazard / Consequence

Air in the system may reduce effectiveness of the rear brakes, increasing the distance required to stop and the risk of a crash.

Factory Remedy & Repair Action

Dealers will install new rear brake hoses, free of charge. Owner notification letters were mailed on June 28, 2021. Owners may contact Ducati customer service at 1-888-391-5446.

Manufacturer Notes: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

NHTSA #21V335000SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS

Received: 01/01/2021▼

NHTSA #18V835000POWER TRAIN:MANUAL TRANSMISSION

Received: 01/01/2021▼

NHTSA #17V812000SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER

Received: 01/01/2021▼

OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

1 Documented Bulletin

Bulletin #SRV-RCL-21-004Safety Recall 21V-315 & 21V-335 / CR211: Monster 821 & 1200 Low-Permeation Rear Brake Hose & ABS Circuit Retrofit

Source: RCSB-21V315-8478.pdf

Mandated Torques:ABS Control Unit Special Banjo Screws (51 / 55): 25 N·m ± 5% (Certification torque)Rear Master Cylinder Special Screw (53): 25 N·m ± 5% (Certification torque)Rear Caliper Special Screw (57): 25 N·m ± 5% (Certification torque)Swinging Arm Hose Grommet Screws (47): 8 N·m ± 10%Airbox M6x25 Screws: 9 N·m ± 10%

Consumable Specs:DOT 4 High Performance Brake FluidSingle-use Copper Crush Washers (Washers B, C, E, F)Self-Locking Cable Ties (Ties 65 & 66)

Genuine Part Numbers:Brake Hose A (Master Cylinder to ABS Control Unit, Chamfered Fitting)Brake Hose D (ABS Control Unit to Rear Caliper, Reinforced Shield)Copper Sealing Washers DIN 7603

NHTSA Recall 21V-315 & 21V-335Ducati Campaign SRV-RCL-21-004 / CR211

Ducati Monster 821 / 1200 Low-Permeation Rear Brake Hose & ABS Circuit

Rear brake hydraulic circuit retrofit: Low-permeation hoses, banjo screws 25 N·m with copper crush washers, swingarm clips 8 N·m & 10x ABS activation bleed test.

Brembo / ABS Safety RecallBanjo Screws 25 N·m / Bleed 10 N·m

Recall Countermeasure Components:Brake Hose A (Master to ABS)Brake Hose D (ABS to Caliper)Copper Washers B, C, E, FSelf-Locking Ties 65 & 66

NHTSA Safety Campaign 21V-315 & 21V-335 / Ducati SRV-RCL-21-004Monster 821 / Monster 1200 / SuperSport / XDiavel

Explore Other Subsystems for this 2019 Ducati Monster / Monster Plus / 821 / 1200

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Subsystem Guide/torques

Fastener Torques

Engine drain plug, axle spindles, caliper mounts, triple clamp pinch bolts & thread lubrication derating guide.

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Subsystem Guide/fluids

Fluids & Capacities

Oil: 3.40 L (3.59 US qt) • Coolant: 2.40 L (2.54 US qt) • Brake: DOT 4

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Subsystem Guide/fuses-relays

Fuses & Relays

Main: N/A • Location: N/A

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Subsystem Guide/valves

Valve Clearances

Intake: N/A mm • Exhaust: N/A mm

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Subsystem Guide/fuel-delivery

Fuel Delivery & TB Sync

Idle: N/A • Rail Pressure: N/A • Vacuum: N/A

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Subsystem Guide/electrical

Charging & Battery

Battery: YT12B-BS (12V 10Ah)

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Subsystem Guide/tires

Tires & Gearing

Front: 120/70 ZR17 (Pirelli Diablo Rosso III / IV) • Rear: 180/55 ZR17 (190/55 ZR17 on Monster 1200)

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Subsystem Guide/suspension

Suspension & Sag

Front Travel: 130 mm • Rear Travel: 140 mm

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Subsystem Guide/maintenance

Maintenance Schedule

Oil: Every 9,000 miles (15,000 km) mi • Valves: N/A • Plugs: Every 18,000 miles (30,000 km) mi

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