Dedicated Subsystem WorkbenchPlatform Gen: 2020–2024

2020 Honda CRF1100L Africa Twin Throttle Body Synchronization & Fuel Delivery

Multi-cylinder vacuum sync specs, idle speed, EFI high-pressure fuel rail PSI, and injector resistance multimeter bench for 2020 Honda CRF1100L Africa Twin.

Technical PassportOEM VERIFIED

Engine

1084cc

Cooling

Liquid-Cooled

Final Drive

525 Chain

Engine Oil

4.00 L (4.23 US qt)

Spark Plug

NGK SILMAR8A9S

Front Tire

90/90-21

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Gen 2020–2024

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2020 through 2024.

SPECS-TO-CART BUNDLESFactory Direct-Fit Maintenance Bundles Available

1-Click verified Motul engine oil service kits, race filters, spark plugs, and brake fluid pre-measured for this 2020 Honda CRF1100L Africa Twin.

Configure Service Bundles→

Select Model Year:(Active: 2020)
5 Production Years (2020–2024)

2020 2021 2022 2023 2024

Suggested Items4 Verified Workshop Consumables Available for this Job

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FSM Induction CalibrationParallel-Twin (270° Phased Crank) (2 Throttle Bores)

Fuel Delivery, Throttle Body Synchronization & Manometer Balancer

Factory intake depression specifications (230 mmHg), electronic fuel pump pressure testing (43.5 PSI), injector resistance, and interactive multi-column manometer balancing.

Warm Idle: 1,150 - 1,250 RPM

Quick Workshop Diagnostic Presets

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

OPTIMAL SYNCHRONIZATION: BALANCED (Δ ≤ 10 mmHg)

Diagnostics:Max Differential: Δ 0 mmHg (Factory Max Tolerance: ≤ 10 mmHg)

All 2 throttle plates pull uniform intake depression within factory engineering tolerance (≤ 10 mmHg / 1.33 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: 230 mmHg (±10 mmHg) at warm idle (1,150 - 1,250 RPM).

Reference: Cylinder #1 (Master)

Mechanism: Bypass Screws

CYL #1

MASTER REF

230mmHg

30.7 kPa · 9.1 inHg

±0 mmHg (Exact Target)

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

CYL #2

SLAVE BORE

230mmHg

30.7 kPa · 9.1 inHg

±0 mmHg (Exact Target)

Vacuum Take-Off Ports: Manifold vacuum spigots with rubber sealing caps

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

11.8 - 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

46 mm

Operating Temp

80°C (176°F)

Induction Type

PGM-FI Electronic Fuel Injection with 46mm Throttle By Wire

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 Manifold vacuum spigots with rubber sealing caps. 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 1,150 - 1,250 RPM, identify Cylinder #1 (Master). Adjust Linkage sync screw between throttle bodies with TBW dual-bore balance until all cylinder columns are within 10 mmHg (1.33 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

0 Open Campaigns (Clean)

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

Verify VIN on NHTSA.gov

No Active Federal Safety Recalls Reported

The U.S. DOT National Highway Traffic Safety Administration (NHTSA) records zero open safety recall campaigns for the 2020 Honda CRF1100L Africa Twin platform. Always check your individual 17-digit VIN at an authorized dealership or via NHTSA.gov for individual recall completions.

OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

1 Documented Bulletin

Bulletin #HON-20V797Safety Recall KL4: CRF1100L Africa Twin In-Tank Fuel Filter Micron Suction Mesh Rebuild

Source: Honda_AfricaTwin_Recall20V797_KL4_FuelFilter.pdf

Mandated Torques:Torque: 12 N·m (9 lbf·ft) (Fuel Pump Base Flange Nuts - Diagonal Crisscross)Torque: 10 N·m (7 lbf·ft) (Fuel Tank Mounting Bracket Bolts)

Consumable Specs:Genuine Micron Fuel Filter Mesh & Chamber PackingClean Isopropyl Alcohol Tank Wash SolventNew Tank Base Sealing O-Ring

Genuine Part Numbers:06161-MKS-30516700-MKS-E01

ADVENTURE SPORTS FUEL SYSTEMExploded View: Tank Agitation Flush & Fuel Filter Assembly (Safety Recall 20V-797 / KL4)

Kit # 06160-MKK-305 • 40x/20x Flush Cycle • 12 N·m Base Nuts • 27 N·m Pivot

INSPECTION TARGETRecall 20V-797 / KL4

Replacement Fuel Filter & Regulator Kit (KL4)

Genuine Kit # 06160-MKK-305 (Filter Kit, Fuel)

FACTORY WORKSHOP SPECIFICATION:

High-Pressure Micron Filtration

CRITICAL WORKSHOP PROCEDURE:

CRITICAL RECALL COUNTERMEASURE: Replaces internal clogged suction strainer and high-pressure filter unit. Kit includes: suction filter, fuel filter, pressure regulator assy, pressure regulator O-ring, fuel pump O-ring, fuel chamber, and fuel pump packing base.