2018 Harley-Davidson Ultra Limited Specifications

Name: 2018 Harley-Davidson Ultra Limited
Brand: Harley-Davidson

Custom / cruiser • Specs last verified 13 July 2026

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2018 Harley-Davidson Ultra Limited Overview

The 2018 Harley-Davidson Ultra Limited is a custom / cruiser motorcycle built around 1746 cc of displacement. Under the tank sits a Four stroke, V-Twin, Milwaukee-Eight 107, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder engine, a compression ratio of 10.0:1. 2018 Harley-Davidson Ultra Limited delivers 154 Nm @ 3250 rpm of torque. From a practical standpoint, the 2018 Ultra Limited tips the scales at 413 kg, carries a 22.7-litre fuel tank, offers a seat height of Unladen 740 mm and spans a 1625 mm wheelbase. That's roughly 112.4 kg heavier than the average custom / cruiser motorcycle in our database. Scroll down for the complete 2018 Harley-Davidson Ultra Limited spec sheet covering every technical detail from suspension travel to tyre sizes.

2018 Ultra Limited - Pros & Cons

Strengths

Fuel injection: The Electronic Sequential Port Fuel Injection (ESPFI) system delivers crisp throttle response and reliable cold starts regardless of altitude or temperature.
Accessible seat height: At Unladen 740 mm, the seat height is approachable for a wide range of rider heights and builds confidence in low-speed manoeuvring.
Large fuel range: The 22.7-litre tank is generously sized, translating to extended range between stops - ideal for touring or longer commutes.
Low-maintenance final drive: Belt final drive means no chain to clean, lube or adjust - meaningfully less routine maintenance than a chain-driven equivalent.

Considerations

Age-related wear: As with any used Ultra Limited, a thorough pre-purchase inspection covering consumables, service history and tyres is always recommended.

Wear Points & Servicing Notes

Heat management in traffic

Ultra Limited's air-cooled design means engine-bay temperatures build up more in stop-start traffic than on a liquid-cooled equivalent - a function of the cooling method itself, not a defect. Mesh riding gear and avoiding prolonged idling help in hot climates.

Fuelling & injector care

Fuelling comes from Electronic Sequential Port Fuel Injection (ESPFI). Systems like this are largely maintenance-free beyond keeping fuel quality decent and injectors clear - a fuel-system cleaner every service interval is cheap insurance.

Brake disc and pad wear

The 2 x 300mm discs, 4 piston caliper ABS front brake gives strong, progressive stopping power. Disc thickness and pad depth are worth checking at every tyre change, since worn pads can score the disc surface.

Suspension condition on used examples

Up front, the Ultra Limited runs 41.3 mm telescopic, cartridge-style damping and Swingarm Mild steel, two-piece drawn and welded section, forged junctions, MIG welded, Rear Shocks Air-adjustable at the rear. On a used example, check fork seals for weeping oil and test the rear linkage for play - seals are a relatively cheap fix but useful when negotiating price.

Final drive maintenance

Final drive is by belt - lower maintenance than chain with no lubrication needed, but tension and tooth wear should still be checked at service intervals.

Frame & chassis check

The frame is Mild steel; tubular frame; two-piece stamped and welded backbone; cast and forged junctions; twin downtubes; bolt-on rear frame with forged fender supports; MIG welded - worth a visual check for corrosion or impact damage around the head-stock and swingarm pivot on any used example, since frame damage is far costlier to fix than any service item.

Handling the weight at a standstill

At 413 kg, the Ultra Limited is a substantial machine - low-speed manoeuvring in car parks takes more physical effort than on a lighter bike, though the weight disappears once rolling.

Ultra Limited - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2018 Harley-Davidson Ultra Limited, start with the basics: check the service book for oil change frequency, inspect the chain and sprockets for wear, and look for oil seepage around the engine casings and rocker covers. A cold start test is invaluable - a well-maintained Ultra Limited should fire up cleanly and settle to a smooth idle within a few seconds.

Oil and filter changes

Regular oil changes are the single most important maintenance task on any Ultra Limited. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. Always use the correct viscosity grade as specified in the owner's manual.

Fuel system care

The Ultra Limited's fuel injection system is durable but benefits from quality fuel and the occasional use of a fuel-system cleaner additive. If the bike has been stored for more than three months, drain and replace the fuel to prevent varnish deposits in the injectors.

2018 Harley-Davidson Ultra Limited - Frequently Asked Questions

What engine does the 2018 Harley-Davidson Ultra Limited have?

The 2018 Harley-Davidson Ultra Limited uses a Four stroke, V-Twin, Milwaukee-Eight 107, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder engine with 1746 cc of displacement. It is air cooled.

How much does the 2018 Harley-Davidson Ultra Limited weigh?

The 2018 Harley-Davidson Ultra Limited weighs 413 kg. This is the manufacturer's wet figure.

How much power does the 2018 Harley-Davidson Ultra Limited make?

The 2018 Harley-Davidson Ultra Limited produces 154 Nm @ 3250 rpm of torque.

What is the fuel tank capacity of the 2018 Harley-Davidson Ultra Limited?

The 2018 Harley-Davidson Ultra Limited has a 22.7-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 378-453 km between stops.

Is the 2018 Harley-Davidson Ultra Limited suitable for shorter riders?

The 2018 Harley-Davidson Ultra Limited has a seat height of Unladen 740 mm. This is a comfortable, accessible height for most riders.

What brakes does the 2018 Harley-Davidson Ultra Limited have?

The 2018 Harley-Davidson Ultra Limited uses 2 x 300mm discs, 4 piston caliper ABS at the front and Single 300 mm disc, 4 piston caliper ABS at the rear.

What tyre sizes does the 2018 Harley-Davidson Ultra Limited use?

The 2018 Harley-Davidson Ultra Limited runs 130/80B17 65H front and 180/65B16 81H rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What gearbox does the 2018 Harley-Davidson Ultra Limited have?

The 2018 Harley-Davidson Ultra Limited is fitted with a 6 Speed transmission.

Harley-Davidson Ultra Limited Spec Evolution

The Harley-Davidson Ultra Limited was produced across 4 model years (2016-2021). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	2016	2018	2020	2021
Wet Weight	414 kg / 896 lbs	413 kg / 910 lbs	413 kg / 910 lb	413 kg / 910 lb
Engine Detail	Four stroke, Twin Cam 103° with integrated oil cooler Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder	Four stroke, V-Twin, Milwaukee-Eight 107, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder	Four stroke, V-Twin, Milwaukee-Eight 114, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder	Four stroke, V-Twin, Milwaukee-Eight 114, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder
Seat Height	Laden 695 mm / 27.3 in Unladen 740 mm / 29.1 in	Unladen 740 mm / 29.1 in Laden 698 mm / 27.5 in	Laden 698.5 mm / 27.5 in Unladen 739.1 mm / 29.1 in	Laden 698.5 mm / 27.5 in Unladen 739.1 mm / 29.1 in
Fuel Capacity	22.7 Litres / 6.0 US gal	22.7 Litres / 6 US gal	22.7 Litres / 6 US gal	22.7 Litres / 6 US gal
Displacement	1690 cc / 103.1 cub in.	1746 cc / 107 cub in	1868 cc / 114 cu in	1868 cc / 114 cu in
Wheelbase	1625 mm / 64 in.	1625 mm / 64 in	1625 mm / 64 in	1625 mm / 64 in
Brakes - Front	2x 300mm disc 4 piston caliper ABS	2 x 300mm discs, 4 piston caliper ABS	2 x 300mm discs, 4 piston fixed	2 x 300mm discs, 4 piston fixed
Ground Clearance	-	116.8 mm / 4.6 in	135 mm / 5.3 in	135 mm / 5.3 in

Key Specifications

Engine

Four stroke, V-Twin, Milwaukee-Eight 107, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder

Power

Not published by manufacturer

Torque

154 Nm / 113.6 lb-ft @ 3250 rpm

Top Speed

Not published by manufacturer

Weight

413 kg / 910 lbs

Fuel Capacity

22.7 Litres / 6 US gal

Full 2018 Harley-Davidson Ultra Limited Specifications

Year 2017 - 18

Make Model Harley Davidson Ultra Limited

Seat Height Unladen 740 mm / 29.1 in Laden 698 mm / 27.5 in

Wheelbase 1625 mm / 64 in

Ground Clearance 116.8 mm / 4.6 in

Length 2600 mm / 101.8 in

Dry Weight 398 kg / 877 lbs

Fuel Capacity 22.7 Litres / 6 US gal

Wet Weight 413 kg / 910 lbs

Max Torque 154 Nm / 113.6 lb-ft @ 3250 rpm

Displacement 1746 cc / 107 cub in

Engine Detail Four stroke, V-Twin, Milwaukee-Eight 107, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder

Bore x Stroke 100 x 111 mm

Compression Ratio 10.0:1

Cooling System Air cooled

Exhaust Chrome, 2-1-2 dual exhaust with tapered mufflers

Fuel Induction Electronic Sequential Port Fuel Injection (ESPFI)

Ignition Single-fire, non-wasted, map-controlled spark ignition

Lubrication Pressurized, dry-sump with oil cooler

Starter Electric

Clutch Multi-plate, wet

Final Drive Belt

Gear Ratios 1st 9.593 2nd 6.65 3rd 4.938 4th 4.0 5th 3.407 6th 2.875

Primary Drive Chain, 34/46 ratio

Transmission / Drive 6 Speed

Frame Type Mild steel; tubular frame; two-piece stamped and welded backbone; cast and forged junctions; twin downtubes; bolt-on rear frame with forged fender supports; MIG welded

Suspension - Front 41.3 mm telescopic, cartridge-style damping

Suspension - Rear Swingarm Mild steel, two-piece drawn and welded section, forged junctions, MIG welded, Rear Shocks Air-adjustable

Rake 26°

Trail 170 mm / 6.7 in.

Brakes - Front 2 x 300mm discs, 4 piston caliper ABS

Brakes - Rear Single 300 mm disc, 4 piston caliper ABS

Tyres - Front 130/80B17 65H

Tyres - Rear 180/65B16 81H

Wheels - Front Contrast Chrome Impeller Cast Aluminum

Wheels - Rear Contrast Chrome Impeller Cast Aluminum

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.