Dedicated Subsystem WorkbenchPlatform Gen: 2015–2026

2019 Ducati Scrambler 800 (Icon / Full Throttle / Nightshift) Throttle Body Synchronization & Fuel Delivery

Multi-cylinder vacuum sync specs, idle speed, EFI high-pressure fuel rail PSI, and injector resistance multimeter bench for 2019 Ducati Scrambler 800 (Icon / Full Throttle / Nightshift).

Technical PassportOEM VERIFIED

Engine

803cc

Cooling

Air/Oil-Cooled

Final Drive

520 Chain

Engine Oil

3.10 L (3.28 US qt)

Spark Plug

NGK DCPR8E

Front Tire

110/80 R18 (Pirelli MT 60 RS)

Gen 2015–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2015 through 2026.

Select Model Year:(Active: 2019)
12 Production Years (2015–2026)

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

FSM Induction Calibration90° L-Twin (Desmodromic) (2 Throttle Bores)

Fuel Delivery, Throttle Body Synchronization & Manometer Balancer

Factory intake depression specifications (240 mmHg), electronic fuel pump pressure testing (43.5 PSI), injector resistance, and interactive multi-column manometer balancing.

Warm Idle: 1,200 - 1,300 RPM

Quick Workshop Diagnostic Presets

Simulate Throttle Linkage Asymmetry, Hunting Idle, or Intake Boot Vacuum Leaks

OPTIMAL SYNCHRONIZATION: BALANCED (Δ ≤ 15 mmHg)

Diagnostics:Max Differential: Δ 0 mmHg (Factory Max Tolerance: ≤ 15 mmHg)

All 2 throttle plates pull uniform intake depression within factory engineering tolerance (≤ 15 mmHg / 2.00 kPa). Delivers immediate linear throttle pickup, silky smooth idle, uniform cylinder torque pulses, and balanced exhaust temperatures.

Workshop Multi-Column Fluid Manometer

Damped intake depression columns. Target spec: 240 mmHg (±15 mmHg) at warm idle (1,200 - 1,300 RPM).

Reference: Horizontal Cylinder (Front Master)

Mechanism: Bypass Screws

CYL #1

MASTER REF

240mmHg

32.0 kPa · 9.4 inHg

±0 mmHg (Exact Target)

Fixed Reference Master. Synchronize all slave throttle bodies to match this column.

CYL #2

SLAVE BORE

240mmHg

32.0 kPa · 9.4 inHg

±0 mmHg (Exact Target)

Vacuum Take-Off Ports: Intake manifold vacuum takeoff ports with brass screw plugs

Damping Protocol: Restrictor valves must be adjusted until columns oscillate no more than ±5 mmHg per intake stroke.

Fuel Pump Pressure & 5-Min Hold Test

EFI Pressure Rail

Running Fuel Pressure

43.5 PSI(3.00 bar)

OEM Running Spec

43.5 PSI (±3 PSI)

PASS: WITHIN OEM RUNNING SPEC

Fuel pump delivery pressure is 43.5 PSI (Factory spec: 43.5 PSI ± 3 PSI / 3 bar). High-pressure regulator and pump rotor operating within factory design threshold.

Connect mechanical gauge to the quick-disconnect fuel rail fitting using an OEM banjo or T-adapter.

Fuel Injector Resistance & Induction Specs

Multimeter Bench Check

OEM Injector Solenoid Resistance

11.9 - 12.5 Ω at 20°C

Measure across injector 2-pin harness socket with ignition OFF. Internal coil resistance increases by ~0.4% per °C rise above 20°C (68°F). Replace injector if resistance reads open (> 100 kΩ) or shorted (< 2 Ω).

Bore Diameter

50 mm

Operating Temp

80°C (176°F)

Induction Type

Electronic Fuel Injection with 50mm/53mm Full Ride-by-Wire Throttle Bodies

Injector O-rings must be lubricated with a light coat of clean engine oil before seating into fuel rail.

4-Step Throttle Body Synchronization Protocol

Official workshop manual step-by-step checklist. Mark each step as you complete it on the workbench.

0 of 4 Steps Complete

1CLICK TO MARK DONE

Engine Pre-Flight Conditioning

Check and adjust valve clearances to spec before attempting sync. Ensure air filter is clean, spark plugs are fresh, and engine is fully warmed to operating temperature (80°C–90°C).

2CLICK TO MARK DONE

Manometer Connection & Damping

Connect 2-column liquid or digital manometer hoses to Intake manifold vacuum takeoff ports with brass screw plugs. Adjust in-line hose restrictor valves to dampen rapid intake pulsation until fluid columns stabilize.

3CLICK TO MARK DONE

Balance Screw Calibration

With engine idling at 1,200 - 1,300 RPM, identify Horizontal Cylinder (Front Master). Adjust Vertical cylinder balance screw with air bleed bypass screws on each runner until all cylinder columns are within 15 mmHg (2.00 kPa) of the master reference.

4CLICK TO MARK DONE

Throttle Blip & Locknut Verification

Blip throttle to 3,000 RPM 2–3 times and verify columns return evenly to idle balance. Tighten any balance screw locknuts securely, re-install rubber vacuum sealing caps, and verify idle speed.

Shop Carb & Throttle Cleaners→Shop Carb & Throttle Sync Tools→Shop Fuel Pressure Test Gauges→

Official NHTSA Safety Recalls & Technical Bulletins

3 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 3 safety recall campaigns associated with this platform. Independent repair shops and riders should confirm that authorized dealership warranty remedies have been applied.

NHTSA #21V361000EXTERIOR LIGHTING:TURN SIGNAL

Received: 01/01/2021▼

Defect Description

Ducati North America (Ducati) is recalling certain 2021 Scrambler 800 Night Shift motorcycles. The front and rear turn signal lights may not flash brightly enough. As such, these motorcycles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."

Safety Hazard / Consequence

Turn signal lights that aren't bright enough can reduce other driver's ability to see that the turn signals have been activated, increasing the risk of a crash.

Factory Remedy & Repair Action

Dealers will replace the front and rear turn signals, free of charge. Owner notification letters were mailed on June 28, 2021. Owners may contact Ducati customer service at 1-888-391-5446. Ducati's number for this recall is SRV-RCL-21-009.

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 #20V781000ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES

Received: 01/01/2021▼

NHTSA #16V891000STRUCTURE:MOTORCYCLE:KICKSTAND/CENTER STAND

Received: 01/01/2021▼