2015 Harley-Davidson FLHR Road King — Maintenance & Ownership Guide
Routine Maintenance
Key maintenance tasks to keep your 2015 Harley-Davidson FLHR Road King running reliably.
Engine Oil
Requires 4.0 quarts of 20W-50 oil; intervals are every 5,000 miles after the initial 1,000-mile break-in.
Brake Fluid
DOT 4 fluid should be flushed every 2 years regardless of mileage to prevent ABS module failure due to moisture.
Common Wear Items
Parts that wear over time on the 2015 Harley-Davidson FLHR Road King and should be inspected regularly.
Tires
Heavy touring weight leads to rear tire squaring; Dunlop Multi-Tread (D407/D408) is the OEM standard for longevity.
Drive Belt
Inspect for debris damage or 'stone pecking' which can lead to premature snapping; typically lasts 50,000+ miles.
Popular Upgrades
The most popular aftermarket upgrades for the 2015 Harley-Davidson FLHR Road King.
Stage 1 Kit
Combination of high-flow air cleaner, slip-on exhausts, and an EFI tuner to reduce engine heat and improve throttle response.
LED Lighting
Upgrading to Daymaker LED headlights and fog lights significantly improves night visibility over the stock halogens.
Common Replacement Parts
Parts that commonly need replacing on the 2015 Harley-Davidson FLHR Road King.
Battery
Uses a high-CCA YTX30L-BS battery; large V-twin engines require significant cranking power, especially in cold weather.
Saddlebag Mounting Pins
Standard pins were known to vibrate loose; many owners replace them with screw-in theft-deterrent hardware.
Used Buying Inspection Checklist
What to look for when buying a used 2015 Harley-Davidson FLHR Road King.
Saddlebag Latches
Oil Cooler Line Clamps
Steering Head Bearings
Hydraulic Clutch Fluid
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