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Factory Workshop SpecificationsPlatform Gen: 1994–2026

2026 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS) Specifications & Consumables

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

Gen 1994–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 1994 through 2026.

Engine
1868cc
Drive
Not Available
Cooling
Air / Oil-Cooled with Rubber-Isolated Frame Mounts

Engineering Subsystem Workbenches & Calculators

Dedicated deep-dive diagnostic tools, torque matrices, wiring pinouts, and calculators tailored for 2026 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS).

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: YTX30L-BS / H-D 66010-97D

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Subsystem Guide/tires

Tires & Gearing

Front: 130/60B19 61H (Special) / 130/80B17 65H (Standard) • Rear: 180/55B18 80H (Special) / 180/65B16 81H (Standard)

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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
Drive Chain PitchBelt Drive
Chain Link Count140-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 CodeYTX30L-BS / H-D 66010-97D
Battery Output & RatingNot Available
Spark Plug Inspection IntervalN/A
Wheels, Tires & Inflation Pressures
Shop Tires →
Front Tire Dimensions130/60B19 61H (Special) / 130/80B17 65H (Standard)
Cold Front Inflation PressureN/A
Rear Tire Dimensions180/55B18 80H (Special) / 180/65B16 81H (Standard)
Cold Rear Inflation PressureN/A
OEM Wheel Rim Widths (F / R)3.50" / 5.50"

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 #18V734000POWER TRAIN:CLUTCH ASSEMBLY
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Defect Description

Harley Safety Recall 0173: Secondary clutch actuator piston seal tear on 2017–2018 Road King and Road King Special models.

Safety Hazard / Consequence

Clutch disengagement failure when stopped in gear creates unintended motion hazard.

Factory Remedy & Repair Action

Dealers install upgraded secondary clutch actuator assembly (Kit #91500093).

NHTSA #16V471000POWER TRAIN:CLUTCH ASSEMBLY
▼
NHTSA #18V076000SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ABS
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OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

3 Documented Bulletins
Bulletin #HD-0173Safety Recall Bulletin 0173 / NHTSA 18V-734: Touring & Softail Secondary Hydraulic Clutch Actuator Piston Assembly (Kit #91500093)
Source: RCMN-18V734-8825.pdf
Mandated Torques:Torque: 10–12 N·m (88–106 in-lb) (Transmission Side Cover Bolts - Cross Pattern)Torque: 26–30 N·m (19–22 lb-ft) (Hydraulic Clutch Line Banjo Bolt)Torque: 10–12 N·m (88–106 in-lb) (Secondary Actuator Bleeder Screw)
Consumable Specs:Harley-Davidson DOT 4 Platinum Brake FluidTransmission Side Cover Gasket
Genuine Part Numbers:9150009337200131A25700445
Bulletin #HD-0169Safety Recall Bulletin 0169 / NHTSA 16V-471: Hydraulic Clutch Master Cylinder Disengagement Inspection & Seal Flush
Source: RCRIT-16V471-6645.pdf
Mandated Torques:Torque: 8.0–10.2 N·m (70–90 in-lb) (Handlebar Clutch Master Cylinder Clamp Screws)Torque: 26–30 N·m (19–22 lb-ft) (Clutch Master Banjo Bolt)
Consumable Specs:Harley-Davidson DOT 4 Platinum Hydraulic FluidPurge Tubing & Catch Bottle
Genuine Part Numbers:37200025C41800041
Recalls 0169 & 0173 • NHTSA 16V-471 & 18V-734

Harley-Davidson Road King & Touring Secondary Hydraulic Clutch Actuator Architecture

Secondary clutch actuator cylinder piston seal inspection, DOT 4 Platinum purge, and transmission side cover torque.

TRANSMISSION RIGHT-SIDE ACTUATOR COVERSECONDARY CYLINDER BOREPISTONCUP SEALSTO CLUTCH PACKBANJO BOLT: 26-30 N·m(19-22 lb-ft • DOT 4 PLATINUM)BLEEDER: 10-12 N·mSIDE COVER BOLTS: 10-12 N·m (88-106 in-lb)RECALL 0173 REMEDY & SPECS:• Actuator Kit: Install OEM Recall Kit #91500093.• Seal Integrity: Inspect cylinder bore for scoring.• Fluid Spec: Harley DOT 4 Platinum Brake Fluid.• Master Cylinder Banjo: 26–30 N·m (19–22 lb-ft).• Actuator Bleeder Screw: 10–12 N·m (88–106 in-lb).• Side Cover Fasteners: 10–12 N·m in cross pattern.• Clutch Master Clamp: 8.0–10.2 N·m (70–90 in-lb).• Lever Freeplay: Verify positive disengagement.• Road King Front Axle: 102 N·m (75 lb-ft).• Road King Rear Axle: 129–142 N·m (95–105 lb-ft).• Brembo Reflex Calipers: 38–52 N·m (28–38 lb-ft).• Spark Plugs (4x M8): 16–24 N·m (Gap 0.8–0.9 mm).
Hydraulic Banjo Bolt26–30 N·m (19–22 lb-ft)
Actuator Bleeder Screw10–12 N·m (88–106 in-lb)
Side Cover Screws10–12 N·m (Cross Pattern)
Mandated Hydraulic FluidHarley DOT 4 Platinum
Bulletin #HD-0171Safety Recall Bulletin 0171 / NHTSA 18V-076: VRSC V-Rod & Touring ABS Hydraulic Control Unit (HCU) Valve Solenoid Flush
Source: RCRIT-18V076-3366.pdf
Mandated Torques:Torque: 26–30 N·m (19–22 lb-ft) (Front & Rear Master Cylinder Banjo Bolts)Torque: 10–12 N·m (88–106 in-lb) (Caliper Bleeder Screws)Torque: 38–52 N·m (28–38 lb-ft) (Front Caliper Mount Bolts)
Consumable Specs:Harley-Davidson DOT 4 Platinum Brake Fluid (Part #99953-99)Moisture Tester / Boiling Point Analyzer (< 3% moisture limit)
Genuine Part Numbers:99953-9942865-06B41800041

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2026 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS) Factory Workshop Specs & Maintenance Guide | WowShopper | WowShopper Motorsports