Dedicated Subsystem WorkbenchPlatform Gen: 2007–2016

2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring) Throttle Body Synchronization & Fuel Delivery

Multi-cylinder vacuum sync specs, idle speed, EFI high-pressure fuel rail PSI, and injector resistance multimeter bench for 2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring).

Technical PassportOEM VERIFIED

Engine

1690cc

Cooling

Air/Oil-Cooled

Final Drive

Belt Drive

Engine Oil

3.80 L (4.00 US qt)

Spark Plug

HD 6R12 / Champion RA8HC / NGK DCPR7E

Front Tire

130/80B17 (Touring) / 100/90-19 (Dyna) / 130/90B16 (Softail)

Gen 2007–2016

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2007 through 2016.

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 2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring).

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Select Model Year:(Active: 2015)
10 Production Years (2007–2016)

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

Suggested Items4 Verified Workshop Consumables Available for this Job

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FSM Induction Calibration45° V-Twin (Twin Cam 96 / 103) (2 Throttle Bores)

Fuel Delivery, Throttle Body Synchronization & Manometer Balancer

Factory intake depression specifications (255 mmHg), electronic fuel pump pressure testing (58 PSI), injector resistance, and interactive multi-column manometer balancing.

Warm Idle: 950 - 1,050 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: 255 mmHg (±15 mmHg) at warm idle (950 - 1,050 RPM).

Reference: Single 50mm Electronic Throttle Body (Dual Cylinder Common Plenum)

Mechanism: Bypass Screws

CYL #1

MASTER REF

255mmHg

34.0 kPa · 10.0 inHg

±0 mmHg (Exact Target)

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

CYL #2

SLAVE BORE

255mmHg

34.0 kPa · 10.0 inHg

±0 mmHg (Exact Target)

Vacuum Take-Off Ports: Capped rubber vacuum test spigot on intake runner

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

58 PSI(4.00 bar)

OEM Running Spec

58 PSI (±3 PSI)

PASS: WITHIN OEM RUNNING SPEC

Fuel pump delivery pressure is 58 PSI (Factory spec: 58 PSI ± 3 PSI / 4 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

12.0 - 14.5 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 Sequential Port Fuel Injection (ESPFI) with 46mm or 50mm Electronic Throttle Body

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 3 Steps Complete

1CLICK TO MARK DONE

Intake Manifold Runner Seal Inspection

Spray intake manifold seals at cylinder heads with carb cleaner while idling to check for vacuum leaks before diagnosing fuel delivery.

2CLICK TO MARK DONE

Fuel Rail Pressure & In-Tank Hose Check

Connect pressure gauge to tank quick-disconnect. Turn key ON: pump must prime to 58 - 62 PSI. Rapid pressure drop indicates ruptured corrugated in-tank fuel line or leaking check valve.

3CLICK TO MARK DONE

Throttle Body & IAC Cleaning

Inspect throttle bore for carbon buildup. Clean throttle plate edges and verify smooth servo motor sweep without binding.

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 2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring) 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

2 Documented Bulletins

Bulletin #M1524M1524: RECALL 0177 - 2019 - 2021 SPORTSTER - HEADLAMP BULB SHIELD

Source: Harley_M1524_Recall0177.pdf

Mandated Torques:Torque: 5.8–6 in-lbs (0.66–0.68 N·m) (Bulb Shield Screw)Torque: 35–44 in-lbs (4–5 N·m) (Bracket to Visor Screws)Torque: 10–16 ft-lbs (13.5–21.6 N·m) (Visor Bracket Screws)

Consumable Specs:Loctite 243 Medium Strength Blue Threadlocker (HD Part # 99642-97)

Genuine Part Numbers:68297-05A9150010799642-97

Fastener Stack ArchitectureExploded View: Headlamp Visor Fastener & Vibration Stack (Bulletin M1524)

3-Stage Torque Map

Select any fastener or shield component to inspect exact torque specifications.

Component InspectorNHTSA Recall 0177 / M1524

Self-Tapping Shield Screw with Blue Loctite 243

Consumable: Loctite 243 (HD # 99642-97)

Factory Torque Specification

5.8–6.0 in-lbs (0.66–0.68 N·m) (CRITICAL LOW TORQUE)

Technical Assembly Note

MUST apply Loctite 243 Blue Threadlocker. Due to reuse of self-tapping screw into stamped bracket, STRICTLY do not exceed 6 in-lbs or threads will strip.

Vibration & Chemical Retention

Loctite 243 Medium Strength Blue Threadlocker (HD Part # 99642-97) mandatory on bulb shield screw to prevent thermal loosening.

Bulletin #Recall0171Part 573 Safety Recall Report 18V-076: ABS Hydraulic Control Unit Flush & Fluid Replacement

Source: Harley_Recall0171_ABS_4574.pdf

Mandated Torques:Torque: 17–22 ft-lbs (23.0–30.0 N·m) (ABS Manifold / Caliper Banjo Bolts)Torque: 35–61 in-lbs (4.0–6.9 N·m) (Brake Caliper Bleeder Screws)

Consumable Specs:Harley-Davidson Platinum Label DOT 4 Brake Fluid

Genuine Part Numbers:41731-01

Explore Other Subsystems for this 2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring)

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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: 3.80 L (4.00 US qt) • Coolant: N/A • Brake: DOT 4 Glycol-Based High-Temp (Dry BP ≥ 260°C / Wet BP ≥ 165°C)

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Subsystem Guide/fuses-relays

Fuses & Relays

Main: 50A Maxi-Fuse • Location: N/A

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Subsystem Guide/compression

Compression & Leakdown

Ratio: 9.6:1 • Std: 165-185 PSI • Limit: 140 PSI

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Subsystem Guide/valves

Valve Clearances

Intake: N/A mm • Exhaust: N/A mm

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Subsystem Guide/electrical

Charging & Battery

Battery: YTX20HL-BS (Dyna/Softail) / YIX30L-BS (Touring) • CCA: 385 • Regulated: 14.2 - 14.8 V DC at 3,000 RPM

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Subsystem Guide/tires

Tires & Gearing

Front: 130/80B17 (Touring) / 100/90-19 (Dyna) / 130/90B16 (Softail) • Rear: 180/65B16 (Touring) / 160/70B17 (Dyna) / 200/55R17 (Fat Boy)

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Subsystem Guide/suspension

Suspension & Sag

Front Travel: 117 mm • Rear Travel: 76 mm

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Subsystem Guide/maintenance

Maintenance Schedule

Oil: Every 5,000 mi (8,000 km) mi • Valves: N/A • Plugs: Every 10,000 mi (16,000 km) mi

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