Factory Workshop SpecificationsPlatform Gen: 1986–2026

2026 Harley-Davidson Heritage Classic / 114 (FLSTC / FLHC / FLHCS) Specifications & Consumables

Official workshop technical reference: fluid capacities, spark plug codes, drive chain specs, and tire inflation pressures.

Gen 1986–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 1986 through 2026.

Select Model Year:(Active: 2026)

1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Engine

1868cc

Drive

Not Available

Cooling

Air / Oil-Cooled with Dual Internal Counterbalancers

Engineering Subsystem Workbenches & Calculators

Dedicated deep-dive diagnostic tools, torque matrices, wiring pinouts, and calculators tailored for 2026 Harley-Davidson Heritage Classic / 114 (FLSTC / FLHC / FLHCS).

10 Dedicated Engineering Spoke Pages

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: 4.70 L (5.00 US qt) • Coolant: Not Applicable (Air / Oil Cooled) • Brake: N/A

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Subsystem Guide/fuses-relays

Fuses & Relays

Main: N/A • Location: N/A

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Subsystem Guide/compression

Compression & Leakdown

Ratio: 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: YTX20HL-BS / H-D 65989-97E

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Subsystem Guide/tires

Tires & Gearing

Front: 130/90B16 73H • Rear: 150/80B16 77H

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Subsystem Guide/suspension

Suspension & Sag

Front Travel: N/A • Rear Travel: N/A

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Subsystem Guide/maintenance

Maintenance Schedule

Oil: N/A • Valves: N/A • Plugs: N/A

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Fluids & Service Capacities

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Engine Oil (Drain & Filter Change)4.70 L (5.00 US qt)

Engine Oil (Drain Only)N/A

Recommended Oil ViscosityH-D Screamin' Eagle SYN3 20W-50 Full Synthetic or Genuine H-D 360 20W-50

Coolant System CapacityNot Applicable (Air / Oil Cooled)

Brake Fluid StandardNot Available

Drivetrain, Chain & Gearing

Gearing Calculator →Shop Chains & Sprockets →

Drive Chain PitchBelt Drive

Chain Link Count133-Tooth Carbon-Fiber Reinforced (24mm width)T Belt

Front Sprocket TeethN/A

Rear Sprocket TeethN/A

Final Drive ConfigurationCarbon Belt Drive

Ignition & Electrical Specifications

Shop Plugs & Batteries →

OEM Spark Plug Part NumberH-D 6R10 / 6R12

Electrode Spark Plug Gap0.8–0.9 mm (0.031–0.035 in)

OEM Battery Reference CodeYTX20HL-BS / H-D 65989-97E

Battery Output & RatingNot Available

Spark Plug Inspection IntervalN/A

Wheels, Tires & Inflation Pressures

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Front Tire Dimensions130/90B16 73H

Cold Front Inflation PressureN/A

Rear Tire Dimensions150/80B16 77H

Cold Rear Inflation PressureN/A

OEM Wheel Rim Widths (F / R)3.50" / 5.50"

Official NHTSA Safety Recalls & Technical Bulletins

2 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 2 safety recall campaigns associated with this platform. Independent repair shops and riders should confirm that authorized dealership warranty remedies have been applied.

NHTSA #25V375000SUSPENSION:REAR:SHOCK ABSORBER

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Defect Description

Harley Safety Recall 0188: 2018–2024 Heritage Classic rear shock pre-load adjuster mounting tab can fracture under vibration.

Safety Hazard / Consequence

Adjuster displacement can lead to tire contact and pressure loss.

Factory Remedy & Repair Action

Dealers install reinforced retention bracket countermeasure kit.

NHTSA #23V591000SUSPENSION:REAR:SHOCK ABSORBER

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OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

2 Documented Bulletins

Bulletin #HD-0181Safety Recall Bulletin 0181 & 0182 / NHTSA 23V-591: Softail Rear Shock Absorber Pre-Load Fastener Rear Tire Contact

Source: RCLRPT-23V591-6615.PDF

Mandated Torques:Torque: 12–15 N·m (106–133 in-lb) (Pre-load Adjuster Bracket Mounting Screw)Torque: 95–108 N·m (70–80 lb-ft) (Upper & Lower Shock Eye Mount Bolts)Torque: 136–149 N·m (100–110 lb-ft) (Rear Axle Cone Nut)

Consumable Specs:Loctite 243 Medium Strength Blue ThreadlockerIsopropyl Alcohol Surface Cleaner

Genuine Part Numbers:102008499150010454000142

Recalls 0181 & 0188 • NHTSA 23V-591 & 25V-375

Harley-Davidson Softail Mono-Shock Pre-Load Adjuster & Tire Clearance Architecture

Fast adjuster bracket reinforcement, tire clearance inspection (≥ 10 mm), and 95–108 N·m shock mounting torques.

Shock Mounting Bolts95–108 N·m (70–80 lb-ft)

Adjuster Bracket Screw12–15 N·m (106–133 in-lb)

Chemical ThreadlockerLoctite 243 (Medium Blue)

Dynamic Tire Clearance≥ 10.0 mm (0.39 in)

Bulletin #HD-TSB-18-09Technical Service Bulletin TSB-18-09: Softail Laced Wheel Spoke Truing, Nipple Torques & Secondary Drive Belt Deflection

Source: H-D_TSB_18-09_Laced_Spokes.pdf

Mandated Torques:Torque: 6.2 N·m (55 in-lb) (Spoke Nipples - Uniform Torque Check)Torque: 136–149 N·m (100–110 lb-ft) (Rear Axle Nut)Torque: 20–24 N·m (15–18 lb-ft) (Belt Tensioner Adjuster Jam Nuts)Torque: 102 N·m (75 lb-ft) (Front Axle Shaft)

Consumable Specs:Spoke Nipple Anti-Corrosion PenetrantAnti-Seize Lubricant (Axle Sliders)

Genuine Part Numbers:43057-084090039241500017

Workshop Procedure • Heritage & Street Bob

Harley-Davidson Heritage Classic Secondary Belt Drive Tension & Axle Alignment

Secondary belt deflection gauge procedure (9.5–12.7 mm @ 10 lbs), axle alignment notch verification, and 136–149 N·m cone nut.

Belt Deflection @ 10 lbs9.5–12.7 mm (3/8–1/2 in)

Rear Axle Cone Nut136–149 N·m (100–110 lb-ft)

Tensioner Jam Nuts20–24 N·m (15–18 lb-ft)

Laced Spoke Nipples6.2 N·m (55 in-lb)

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