2017 Harley-Davidson FLHTKL Ultra Limited Low — Maintenance & Ownership Guide
Routine Maintenance
Key maintenance tasks to keep your 2017 Harley-Davidson FLHTKL Ultra Limited Low running reliably.
Engine Oil
Requires 5.0 quarts of 20W-50 oil. Intervals are every 5,000 miles, but many owners change at 3,000 miles due to heat concerns in early M8 engines.
Primary & Transmission Fluid
Primary takes approx 1.1 quarts; Transmission takes 1.0 quart. Essential to monitor for fluid transfer issues common in 2017-2018 models.
Common Wear Items
Parts that wear over time on the 2017 Harley-Davidson FLHTKL Ultra Limited Low and should be inspected regularly.
Brake Pads
The heavy 900lb+ wet weight leads to relatively fast wear on the Brembo-sourced pads, especially the rear.
Rear Tire
The high torque of the M8 107 can wear the rear Dunlop D407T quickly, often needing replacement every 8,000–12,000 miles.
Popular Upgrades
The most popular aftermarket upgrades for the 2017 Harley-Davidson FLHTKL Ultra Limited Low.
Stage 1 Air Intake & Exhaust
Improves the restricted stock airflow and provides the traditional Harley exhaust note while reducing engine heat.
Cooling Fan
Adding a 'Cool-Flow' fan helps pull heat away from the rear cylinder and passenger in slow-moving traffic.
Common Replacement Parts
Parts that commonly need replacing on the 2017 Harley-Davidson FLHTKL Ultra Limited Low.
Oil Pump
The original 2017 oil pump is prone to sumping. Many owners replace it with the updated 2020+ OEM pump or an S&S Cycle high-flow unit.
Primary Vent Kit
Installed to stop 'fluid transfer' where transmission oil migrates into the primary housing due to a pressure differential.
Used Buying Inspection Checklist
What to look for when buying a used 2017 Harley-Davidson FLHTKL Ultra Limited Low.
Transmission Fluid Level
Check if the transmission dipstick is low while the primary is overfilled; this confirms the 'fluid transfer' issue.
Air Cleaner Housing
Check for oil pooling in the air cleaner. This is a primary symptom of 'sumping' where oil is forced out of the breathers.
Clutch Master Cylinder Recall
Verify if the recall for the hydraulic clutch master cylinder (Recall 0173) has been performed, as it can cause the clutch to fail to disengage.
Oil Cooler Line Clamps
Check for signs of oil misting near the front down-tubes; early 2017 models had a recall for improperly installed oil line clamps.
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