2018 Harley-Davidson FLHTK Electra Glide Ultra Limited Parts & Accessories
Touring Motorcycle
Milwaukee-Eight Touring (2017-2023)
1,089 parts available
244 Performance
156 Maintenance
689 Accessories
2018 Harley-Davidson FLHTK Electra Glide Ultra Limited
About the 2018 Harley-Davidson FLHTK Electra Glide Ultra Limited
The 2018 Harley-Davidson FLHTK Ultra Limited is a premium long-haul touring motorcycle featuring the Twin-Cooled Milwaukee-Eight 107 engine. It represents the second year of the Milwaukee-Eight platform, offering improved heat management and power over the previous Twin Cam generation. This model year is notable for the 115th Anniversary Edition, which introduced exclusive serialized paint and styling details.
What Makes This Trim Special
- Twin-Cooled Engine — Uses liquid-cooled heads; the standard Ultra Classic (FLHTCU) used only oil-cooling in 2018.
- Infotainment System — Standard Boom! Box 6.5GT with touchscreen and navigation (Ultra Classic often had the 4.3 non-touch).
- Heated Handgrips — Factory-installed with 6 heat settings.
- Tour-Pak Luggage Rack — Standard chrome luggage rack on top of the Tour-Pak.
- 115th Anniversary Edition — Available Legend Blue/Vivid Black two-tone paint, serialized tank cloisonné, and blue seat stitching.
Key Specifications
| Engine |
Twin-Cooled Milwaukee-Eight 107 V-Twin Features 4 valves per cylinder and dual spark plugs |
| Displacement | 1,746 cc (107 cu in) |
| Fuel System | Electronic Sequential Port Fuel Injection (ESPFI) |
| Cooling |
Liquid-cooled cylinder heads and oil-cooled radiators (Twin-Cooled) The 'Twin-Cooled' system uses small radiators hidden in the lower fairings to cool the cylinder heads. |
| Transmission | 6-Speed Cruise Drive |
| Drivetrain | Belt drive, 34/46 ratio primary |
| Front Suspension | 49mm Dual Bending Valve (SDBV) telescopic forks |
| Rear Suspension | Premium hand-adjustable emulsion shocks |
| Front Brakes |
Dual 32mm 4-piston fixed Brembo calipers with floating rotors Equipped with Reflex Linked Brakes and standard ABS |
| Rear Brakes | Single 32mm 4-piston fixed Brembo caliper |
| Front Tire | 130/80B17 65H |
| Rear Tire | 180/65B16 81H |
| Weight | 910 lbs (running order) |
| Seat Height | 29.1 in (unladen) |
| Fuel Capacity | 6.0 gal |
Ownership at a Glance
What to know about maintaining a 2018 Harley-Davidson FLHTK Electra Glide Ultra Limited
Maintenance
Wear Items
Upgrades
Replacements
Known Issues 3
Top reported problems from owners and mechanics
High
Oil Sumping
Oil accumulates in the crankcase instead of returning to the tank, causing power loss and potential engine damage.
High
Lifter Failure
Stock lifters can fail prematurely, especially on bikes with performance cams or high mileage.
Medium
Transmission-to-Primary Fluid Transfer
A vacuum effect pulls oil from the transmission into the primary case through the main shaft.
Parts Most Owners Need
Performance Upgrades 244
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Alloy Art
Alloy Art Gooden-Tite Swingarm Reinforcement Bushings
$124.95 - $135.95
3 options
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Arlen Ness
Arlen Ness Inverted, Method, Clear Tear and Sidekick Air Cleaner Replacement Components
$24.95 - $58.95
20 options
In Stock
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Maintenance Parts 156
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Arlen Ness
Arlen Ness Big Sucker™ Stage I Air Filter Kits for M-Eight
$349.95 - $664.95
17 options
In Stock
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Accessories 689
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Arlen Ness
Arlen Ness Adjustable Driver and Passenger Floorboards
$624.95 - $889.95
6 options
In Stock
Frequently Asked Questions About the 2018 Harley-Davidson FLHTK Electra Glide Ultra Limited
No, the 2018 FLHTK Ultra Limited came standard with the Milwaukee-Eight 107. The 114 engine was only standard on CVO models in 2018 and became standard on the Ultra Limited in 2019.
The Ultra Limited (FLHTK) features the Twin-Cooled engine (liquid-cooled heads), heated grips, Tour-Pak luggage rack, and the premium 6.5GT infotainment system as standard. The Ultra Classic (FLHTCU) is oil-cooled and lacks these premium features.
No, the FLHTK does not come with a factory reverse gear. This is only standard on Tri-Glide models, though aftermarket reverse kits are available.
Yes, it uses Harley-Davidson's Electronic Sequential Port Fuel Injection (ESPFI).
The fuel tank holds 6.0 US gallons (22.7 liters).
It uses a YTX30L-BS equivalent battery (Harley Part #66010-97D).
Check the transmission dipstick; if the level is low and the primary case appears overfilled (oil coming out of the derby cover when level), you likely have the transfer issue.
The unladen seat height is 29.1 inches; with a 180lb rider, it drops to approximately 27.5 inches.
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