2017 Harley-Davidson FLHTK Electra Glide Ultra Limited — Maintenance & Ownership Guide
Routine Maintenance
Key maintenance tasks to keep your 2017 Harley-Davidson FLHTK Electra Glide Ultra Limited running reliably.
Oil & Filter
Requires 20W-50 motorcycle oil. The M8 engine uses a specific oil filter (longer than Twin Cam filters) to accommodate higher flow rates.
Primary & Transmission Fluid
Distinct fluids for the primary chaincase and transmission. Owners often switch to synthetic fluids to improve shifting feel.
Coolant
The Twin-Cooled system requires Harley-Davidson Extended Life Antifreeze. Check levels in the reservoir located in the right-side lower fairing.
Common Wear Items
Parts that wear over time on the 2017 Harley-Davidson FLHTK Electra Glide Ultra Limited and should be inspected regularly.
Brake Pads
Heavy touring weight leads to faster wear on the Brembo pads, especially with the Reflex Linked system which applies both brakes together above 20-25 mph.
Rear Tire
The high torque of the M8 107 can wear the rear Dunlop Multi-Tread tire quickly, often needing replacement every 8,000–12,000 miles depending on load.
Popular Upgrades
The most popular aftermarket upgrades for the 2017 Harley-Davidson FLHTK Electra Glide Ultra Limited.
Stage I Air Intake & Exhaust
Improves the 'Harley sound' and throttle response. Requires an ECM recalibration (tuner).
Boom! Box GTS Radio
Many owners upgrade the 2017 6.5 GT unit to the 2019+ GTS unit for Apple CarPlay/Android Auto support and faster processing.
Vented Dipstick
Helps relieve crankcase pressure, which is a contributing factor to the sumping and oil carryover issues in early M8 engines.
Common Replacement Parts
Parts that commonly need replacing on the 2017 Harley-Davidson FLHTK Electra Glide Ultra Limited.
Oil Pump
Early 2017 M8 engines are prone to sumping. Replacing the stock pump with the 2020+ updated OEM version or an S&S unit is a common preventative measure.
Clutch Slave Cylinder
The 2017 model was part of a major recall for the secondary clutch actuator leaking fluid internally, leading to clutch failure.
Used Buying Inspection Checklist
What to look for when buying a used 2017 Harley-Davidson FLHTK Electra Glide Ultra Limited.
Oil Sumping Check
Run the bike to operating temperature, then check if it feels sluggish or if oil is blowing out of the air cleaner. This indicates a failing scavenge pump.
Transmission-to-Primary Transfer
Check the transmission dipstick level and the primary fluid level. A known issue where fluid migrates through the pushrod tunnel.
Coolant Pump Operation
Listen for the electric coolant pump running after a hot shutdown. These pumps are known to fail, leading to overheating in the heads.
Service History for Recalls
Verify that Recall 0170 (oil cooler lines) and Recall 0173 (clutch actuator) have been performed by a dealer.
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