2015 Harley-Davidson FLHTK Electra Glide Ultra Limited — Maintenance & Ownership Guide
Routine Maintenance
Key maintenance tasks to keep your 2015 Harley-Davidson FLHTK Electra Glide Ultra Limited running reliably.
Oil & Filter
Requires 20W-50 motorcycle oil; 4-quart capacity. Standard interval is 5,000 miles, but many owners change at 3,000 miles.
Coolant
Uses a specific Harley-Davidson extended life coolant. System should be inspected for levels in the surge tank located in the right-side fairing lower.
Brake Fluid
Uses DOT 4 fluid. Must be flushed every 2 years to prevent moisture buildup, which can damage the ABS actuator.
Common Wear Items
Parts that wear over time on the 2015 Harley-Davidson FLHTK Electra Glide Ultra Limited and should be inspected regularly.
Tires
The heavy weight of the FLHTK (nearly 900 lbs) leads to faster wear on the rear tire, typically lasting 10k-15k miles depending on load.
Brake Pads
Brembo-sourced pads provide excellent stopping power but can wear quickly on the heavy touring chassis, especially with the linked braking system.
Drive Belt
The final drive belt requires tension checks every 5,000 miles and should be inspected for debris punctures or cracked teeth.
Popular Upgrades
The most popular aftermarket upgrades for the 2015 Harley-Davidson FLHTK Electra Glide Ultra Limited.
Exhaust
Slip-on mufflers (like H-D Street Cannons or Vance & Hines) are common to improve the exhaust note over the quiet stock pipes.
Rear Suspension
The stock air-adjustable shocks are often replaced with premium coil-over shocks (e.g., Legend or Ohlins) for a more consistent ride.
LED Lighting
While it has Daymaker headlights, owners often upgrade the rear turn signals and brake lights to brighter LED inserts for better visibility.
Common Replacement Parts
Parts that commonly need replacing on the 2015 Harley-Davidson FLHTK Electra Glide Ultra Limited.
Water Pump
The electric water pump on 2014-2016 models is a frequent failure point; failure causes an engine light and potential overheating.
Saddlebag Latches
The 'One-Touch' latches are convenient but can become loose or misaligned, leading to rattling or difficulty closing.
Used Buying Inspection Checklist
What to look for when buying a used 2015 Harley-Davidson FLHTK Electra Glide Ultra Limited.
Hydraulic Clutch Recall
Check if the 2015 recall for the clutch master cylinder (gas bubbles) was performed. A soft or 'dead' lever after sitting is a symptom.
Coolant Leaks
Inspect the fairing lowers for signs of dried coolant (pink/orange crust) near the radiators or thermostat housing.
Saddlebag Mounts
Verify the saddlebag mounting pins have been updated or are secure; early versions could allow the bag to fall off.
Infotainment Screen
Check the 6.5GT screen for 'ghost touches' or delamination, which can occur from sun exposure or moisture.
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