Dedicated Subsystem WorkbenchPlatform Gen: 1994–2026
2020 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS) Factory Maintenance Schedule & Service Punch-List
Official manufacturer service intervals (4k, 8k, 12k, 16k, 24k miles), interactive workshop maintenance punch-list, and DIY vs dealership cost estimator for 2020 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS).
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.
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 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS).
Select Model Year:(Active: 2020)
33 Production Years (1994–2026)
Suggested Items4 Verified Workshop Consumables Available for this Job
View Suggested Items ↓OEM Workshop Archives
3 Documented BulletinsOfficial Factory Service Bulletins & Field Updates
Bulletin #HD-0173Safety Recall Bulletin 0173 / NHTSA 18V-734: Touring & Softail Secondary Hydraulic Clutch Actuator Piston Assembly (Kit #91500093)
Source: RCMN-18V734-8825.pdfMandated 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.pdfMandated 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.
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.pdfMandated 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
Factory Service Schedule
Scheduled Maintenance Punch-List & Service Estimator
Select a factory interval milestone or enter your current odometer reading to preview scheduled workshop tasks for the 2020 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS).
ODOMETER:MILES
FACTORY INTERVALS:
Workshop Tablet Punch-List Progress0 of 9 Tasks Signed Off (0%)
Fluids & Engine
DUE NOW~0.8 HR EST
Engine Oil & Filter Element Replacement
4.70 L (5.00 US qt) / H-D
- Drain Plug Torque: Not Available - Refer to Factory Workshop Manual
- Always install a fresh OEM aluminum crush washer (M12/M14)
- Pre-lube new filter O-ring with fresh engine oil prior to spin-on install
- Warm engine to operating temperature before draining for complete sediment evacuation
TOOLS: 17mm Hex Socket + 65mm 14-Flute Filter Cup
PARTS/FLUIDS: H-D Full Synthetic 4T Oil + Filter + Crush Washer
Ignition & Air
INSPECT / OK~1.2 HR EST
Spark Plug Inspection / Direct-Replacement
H-D 6R10 / 6R12 (Gap: 0.8–0.9 mm)
- Tightening Torque: Not Available - Refer to Factory Workshop Manual
- Hand-thread plug completely down to cylinder head seat before applying torque wrench
- Inspect electrode coloration for stoichiometric AFR balance (tan/light grey)
- Apply thin film of dielectric grease to interior of coil-on-plug boots
TOOLS: 14mm / 16mm Thin-Wall Spark Plug Socket + Feeler Gauge
PARTS/FLUIDS: H-D 6R10 / 6R12 + Dielectric Silicone Grease
Hydraulics & Brakes
INSPECT / OK~1 HR EST
Brake Fluid Full Hydraulic Flush & De-Aeration
Hydraulic Brake Fluid Flush (Front Dual + Rear)
- Bleeder Nipple Torque: Not Available (Do not over-torque aluminum threads)
- Hygroscopic degradation: brake fluid absorbs atmospheric moisture; discard if moisture > 3.7%
- Flush master cylinder reservoir completely before cycling ABS hydraulic modulator
- Wash painted/plastic bodywork immediately with clean water if fluid contact occurs
TOOLS: 8mm / 10mm Bleeder Box Wrench + Clear Bleeder Hose + Catch Bottle
PARTS/FLUIDS: Brake Fluid + Isopropyl Alcohol
Hydraulics & Brakes
DUE NOW~0.4 HR EST
Rotor Thickness & Pad Friction Lining Inspection
Front Min: Refer to Rotor Carrier Stamp | Rear Min: Refer to Rotor Carrier Stamp
- Front Caliper Mounting Torque: Not Available - Refer to Factory Workshop Manual
- Minimum friction material thickness: 1.0 mm (excluding steel backing plate)
- Check rotor surface for deep grooving, heat bluing, or radial thermal stress cracks
- Verify caliper slide pins are free of corrosion and lubricated with silicone grease
TOOLS: Digital Micrometer (0-25mm) + Vernier Caliper + Torx T50 / 12mm Socket
PARTS/FLUIDS: Brake Contact Degreaser + High-Temp Synthetic Caliper Pin Grease
Drivetrain
DUE NOW~0.4 HR EST
Drive Belt Deflection & Cog Inspection
Belt Deflection 5-7 mm @ 10 lbs
- Check drive belt deflection using spring-loaded belt tension tester
- Inspect cog teeth for stone chips, cord fraying, or uneven tooth wear
- Verify rear wheel alignment hash marks are matched evenly on both swingarm sides
TOOLS: Rear Axle Socket (27mm/32mm) + Alignment Gauge + Torque Wrench
PARTS/FLUIDS: O-Ring Safe Chain Degreaser + Synthetic Chain Lube
Ignition & Air
INSPECT / OK~0.5 HR EST
Engine Air Intake Filter Element Service
OEM High-Efficiency Paper Element / Multi-Layer Cotton
- Remove fuel tank / side fairing panels to access airbox cover screws
- Inspect airbox lower cavity and drain hose for blowby oil condensation
- Do not blow compressed air through viscous paper filter elements (destroys filtration matrix)
- Verify airbox lid seal is properly seated to prevent unfiltered dust bypass
TOOLS: 4mm / 5mm Hex Allen Wrenches + JIS #2 Screwdriver
PARTS/FLUIDS: Replacement OEM Air Filter Element + Clean Microfiber Cloth
Fluids & Engine
INSPECT / OK~1 HR EST
Engine Cooling System Flush & Radiator De-Aeration
Silicate & Borate-Free HOAT 50:50 Premix (-37°C / -35°F)
- Only open radiator cap when engine is completely cold (ambient temperature)
- Drain coolant from water pump drain bolt and radiator lower hose connection
- Flush cooling circuit with distilled water before filling with fresh 50:50 HOAT coolant
- Cycle engine until radiator fan activates, then burp cooling jacket to eliminate air pockets
TOOLS: 8mm / 10mm Drain Bolt Socket + Catch Pan + Radiator Cap Tester
PARTS/FLUIDS: Silicate-Free Long-Life Motorcycle Coolant (50:50 Distilled Water Premix)
Valvetrain
INSPECT / OK~3.8 HR EST
Valve Clearance Inspection & Camshaft Timing Audit
Not Available
- Strict requirement: engine must be cold (temperature <= 35°C / 95°F) for accurate readings
- Rotate crankshaft to compression Top Dead Center (TDC) for each cylinder firing order
- Shim Diameter: Not Available
- Replace valve cover gasket and spark plug well O-rings upon reassembly
TOOLS: Angled Blade Feeler Gauges (0.04-0.35mm) + Digital Micrometer + Magnet Pen
PARTS/FLUIDS: Valve Shim Assortment Kit + OEM Valve Cover Gasket + ThreeBond Liquid Gasket
Chassis & Safety
DUE NOW~0.5 HR EST
Chassis, Axle & Safety Critical Fastener Audit
Front Axle: Not Available - Refer to Factory Workshop Manual | Rear Axle: Not Available - Refer to Factory Workshop Manual
- Front Axle Pinch Bolts: Factory Torque Spec
- Front Caliper Mounting Bolts: Not Available - Refer to Factory Workshop Manual
- Check triple clamp pinch bolts, handlebar clamps, and footpeg brackets
- Inspect steering head bearings for notchiness or play at center-detent
TOOLS: Calibrated 3/8" & 1/2" Click-Type Torque Wrenches + Metric Sockets
PARTS/FLUIDS: Blue Medium-Strength Threadlocker (Loctite 243)
Tool Pre-Flight
Calibrated Instruments & Drive SpecificationsWorkshop Tool & Chemical Pre-Flight Card
Sockets, Hex Bits & Wrenches
17mm Metric Hex Socket
Engine oil drain plug removal & torquing
65mm 14-Flute Oil Filter Cup Wrench
Spin-on oil filter removal & install (3/8" drive)
14mm / 16mm Thin-Wall Spark Plug Socket
Spark plug removal & installation
12mm / 14mm Radial Caliper Socket
Brake caliper mounting bolts
8mm / 10mm Bleeder Box Wrench
Hydraulic caliper bleed nipple opening
Front & Rear Axle Sockets (19mm - 32mm)
Wheel axle spindle nuts & chain adjustment
Calibrated Precision Instruments
1/4" Drive Torque Wrench (5 - 25 N·m)
Bleed valves, spark plugs, casing screws
1/2" Drive Torque Wrench (30 - 160 N·m)
Axle nuts, caliper bolts, drain plugs
Angled Blade Feeler Gauge Set (0.04 - 0.35 mm)
Valve clearances & spark plug electrode gap
Digital Rotor Micrometer (0 - 25 mm)
Brake disc minimum discard thickness verification
Workshop Chemicals & Consumables
Blue Medium Threadlocker (Loctite 243)
Brake caliper, rotor, and footpeg fasteners
High-Temp Anti-Seize Paste
Spark plug threads & axle spindle coating
DOT 4 Synthetic Brake Fluid
Hydraulic brake & clutch system flushing
Synthetic O-Ring Chain Degreaser & Lube
Drive chain cleaning & roller lubrication
New OEM Aluminum Crush Washers (M12 / M14)
Oil drain plug sealing (single-use)
Dealership Flat-Rate Labor vs. DIY Workshop Cost Estimator
Compare authorized dealership retail service invoicing against performing scheduled maintenance in your private shop.
DEALER LABOR RATE:$150/hr
Estimated Dealership Retail Invoice
Flat-Rate Labor (2.1 hrs @ $150/hr):$315.00
OEM Fluids & Parts (35% Dealer Markup):$95.00
Shop Supplies & Waste Disposal Fee:$25.00
Dealership Quote Subtotal:$435.00
DIY Private Workshop Investment
Factory Fluids & Replacement Filters:$70.00
Workshop Mechanical Labor:$0.00 (Owner Performed)
Environmental Disposal Fee:$0.00 (Free Auto Recycling)
Total DIY Investment:$70.00
You Save $365.00 (84%) by Servicing in Your Workshop
Includes matched OEM fluid capacities, filter, and authentic factory torque specifications.
1-Click Factory Service KitOEM Spec Fluid Capacities Matched
Workshop Maintenance Kit & Factory Fluids
Authentic factory-grade motor oil, oil filter, and high-temp brake fluid matched precisely to 2020 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS) capacities.
Full Kit Subtotal
$47.80
SPECS-TO-CART BUNDLESDedicated Direct-Fit Maintenance Bundles Available
Explore interactive 1-click oil change packs, brake flush kits & major tune-up bundles pre-measured for this 2020 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS).
Matches factory 20W-50 spec (Oil spec: 4.70 L (5.00 US qt))
Item Price
$47.80($11.95 ea)
Factory OEM Spark Plug Spec
H-D 6R10 / 6R12
Gap: 0.8–0.9 mm (0.031–0.035 in)
Inspection milestone: Not Available. Exact factory part specification.
Authentic OEM Reference
Search OEM Plugs →Explore Other Subsystems for this 2020 Harley-Davidson Road King / Road King Special (FLHR / FLHRC / FLHRXS)
Jump straight into dedicated factory specifications and interactive workshop diagnostic engines.
Subsystem Guide/torques
Fastener Torques
Engine drain plug, axle spindles, caliper mounts, triple clamp pinch bolts & thread lubrication derating guide.
Open Dedicated Workbench →
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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