Harley-Davidson 2024 Road Glide / Street Glide Maintenance Schedule and Service Info

This is the maintenance schedule and service intervals for the 2024 Harley-Davidson Road Glide and Street Glide (FLHX / FLTRX), with an updated 2024 partially liquid-cooled Milwaukee-Eight engine.

The Road Glide and Street Glide are a closely related pair of motorcycles in Harley-Davidson’s Touring range. They’re distinguished mostly by the front fairing construction — it’s a matter of style to choose between them. But the underpinnings are the same — the 117 c.i. Milwaukee-Eight motor with liquid cooling in the cylinder heads, running a compression ratio of 10.3:1 to make peak power of 105 hp / 78 kW at 4600 rpm, a slight increase over the specs of the previous gen M8-powered Glide.

The final drive is via Harley-Davidson’s 6-speed “Cruise Drive” and a belt.

The Road Glide and Street Glide come in a dazzling array of colours. Here are a few of them below.

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Harley-Davidson Road Glide / Street Glide Service Intervals

Like most Harley-Davidson motorcycles, the Harley-Davidson FLHX and FLTRX have 5000 mile / 8000 km or annual service intervals.

At every service, change the oil and filter, and look over the motorcycle for items needing lubrication, adjustment, or cleaning. Also check wearable items (like hoses and tires) to see if they’re still in good condition.

As the Milwaukee-Eight motor has self-adjusting hydraulic valve lifters, there is no valve service interval. However, Harley-Davidson does suggest you change the spark plugs every 30000 miles / 48000 km or two years.

As well as engine oil, you need to periodically replace both primary chaincase lubricant and transmission lubricant, though less often than the oil (see below).

One addition for the 2024 model year is liquid cooling. Anathema to some traditionalists, the 2024 Road and Street Glide models have liquid-cooled cylinder heads — though the cylinders are still air-cooled. Thus, there’s now a radiator and a coolant service interval (which is very wide, mind you).

A number of items need to be done less frequently, like changing the brake fluid. See the schedule for more details.

Maintenance schedule for the Harley-Davidson Street Glide / Road Glide (FLHX / FLTRX) from 2024

Below is the service schedule for the Harley-Davidson 2024+ FLHX and FLTRX. This comes from the manual (they share a manual), but has been clarified for legibility.

For convenience, we’ve ordered it so that the most important elements (fluid changes and major checks) are at the top, and we’ve separated the items to inspect (e.g. condition of cables and moving parts) into a separate “inspection checklist”.


  • Some items (starting with the oil change) have a time-based or distance-based service interval. Use the earlier of the two.
  • One interesting point is the replacement of spark plugs every two years, regardless of mileage.
km x 10001.681624324048
mi x 1000151015202530Every
Engine oil — ChangeYear
Oil filter — ChangeYear
Primary chaincase lubricant — ReplaceYear
Transmission lubricant — ReplaceYear
(Spoked wheels) Front and rear spoke tightness — Check15000 mi / 24000 km
Spark plugs — Change2 years
Air cleaner filter — InspectYear
Brake fluid — Change (Castrol DOT 4)2 years
Safety critical screws and nuts — Tighten
– Hand control switch housing screw
– Clutch lever handlebar clamp
– Front brake handlebar clamp screw
– Front axle nut torque
– Rear axle nut torque
Windshield bushings — Inspect
Steering head bearings — Lubricate
Engine coolant — Replace45000 mi / 72000 km
Fuel filter — Replace100,000 mi / 161,000 km
Harley-Davidson Road Glide / Street Glide Service (2024, liquid-cooled)

Inspection Checklist

Below is the standard service checklist for the Harley-Davidson Road Glide and Street Glide (FLHX and FLTRX). Do this according to the schedule above.

Some items are recommended to be checked annually — these are checked in the second column.

Standard Inspection Checklist — 2024 Road Glide / Street GlideAnnual
Electrical equipment and switches – Inspect
Tire pressure and tread (front and rear) – Check
Brake fluid content (front and rear) – Check level and moisture content. Replace if moisture over 3%.
Clutch cable – Adjust and check for leaks, contact, or abrasion. Lubricate cable with Harley-Davidson lubricant
Engine coolant — Check level and freeze point, and check system for leaks
Radiators — Clean
Oil and brake lines – Inspect
Fuel lines and fittings — Inspect
Brake fluid level, front and rear — Inspect
Brake pads (front and rear) – Check wear
Minimum thickness: 0.4 mm / 0.016 in
Brake discs — Check wear
Brake and clutch controls – Lubricate
Jiffy stand – Lubricate
Drive belt and sprockets – Inspect
Drive belt – Check / Adjust tension
Rear sprocket isolators – Inspect at every tire change
Exhaust system, fasteners, and shields – Inspect
12-volt battery — Check voltage, terminal torque, and terminal cleanliness. Lubricate terminals with contact lubricant
Fuel door hinge and latch – Lubricate
Component and system function – Road test
Standard Annual Service (Touring, 2024)

Belt Maintenance

Below are more details on belt maintenance.

To check the belt tension on your 2024 Street Glide / Road Glide, follow the procedure below. (Refer to the below image, too.)

2024 FLTRX FLHX Belt Deflection

You need a belt tension tool and a ruler. You can use either the standard Harley-Davidson tool or a generic one (they do the same thing).

  1. Put the motorcycle in neutral on its stand, with the rear wheel on the ground.
  2. Push up on the middle of the bottom half of the belt until the belt tension gauge registers 10 lb (4.5 kg) of pressure.
  3. Use the ruler to measure belt tension.

Target belt tension for the Harley-Davidson Street Glide / Road Glide: 1/4 – 7/16 in / 6.4-11.2 mm (4-7 gradations in the deflection window)

If the belt tension is out of spec, you can either adjust it yourself if you’re familiar with how, or take it to a dealer.

Tires sizes and Pressures for the Harley-Davidson Road / Street Glide (2024)

Both the Road Glide and Street Glide run the same tires in a 19/18-inch combo. The tires are Dunlops custom made for the bikes.

WheelTire sizeTire pressures (cold)
Front130/60B19 M/C 61H36 psi / 248 kPa
Rear180/55B18 M/C 80H40 psi / 276 kPa
Harley-Davidson 2024 FLHX / FLTRX tire sizes and pressures

Of course, adjust pressures as suits your riding style and needs.

About the 2024 Harley-Davidson Road Glide / Street Glide

The Road Glide and Street Glide are staples in the touring market. There are times when it seems that everyone is on one or the other — particularly when crossing the country on long trips, and doubly particularly in the USA.

But that doesn’t stop the fact that they’re awesome bikes. In fact, it’s because of it. They’re well thought out, comfortable, fully-equipped touring machines that turn miles into joy.

The Road and Street Glide have for a while been near the premium end of Harley-Davidson’s tourers. Only a few models sit above them — like the CVO touring models and the Ultra, which is even more plush, especially for the passenger.

While Harley-Davidson is very much a “if it ain’t broke” kind of manufacturer, in 2024, they’ve significantly updated the Road Glide and Street Glide. And while many point at the redesigned fairings or external parts and indicate that’s where the important changes are, for people obsessed with maintenance, it’s the engine.

The heart of the FLHX and FLTRX is still a Milwaukee-Eight motor, a large-capacity pushrod-activated “Big Twin”. But Harley-Davidson is slowly transitioning the engines from being air-cooled (via air/oil-cooled) to being liquid cooled.

For now, there’s liquid cooling just for the cylinder heads, and focusing on the rear, and focusing on the exhaust valves there. This means the cooling system is quite small, with less than a litre (or quart) of coolant, and only a small radiator up front.

2024 Harley_Davidson FLHX Street Glide front wheel and radiator
2024 Harley-Davidson FLHX Street Glide front wheel and radiator

The design is different from the Ultra Limited, a bike which has had “Twin Cooling” for over a decade, and which uses twin side-mounted radiators.

Maintenance of the cooling system is in theory low. Harley-Davidson prescribes a long-life coolant which only breaks down over a long period of time. So the coolant replacement interval is 45,000 mi or 72,000 km — with no time interval, interestingly.

Early models of twin-cooled Harleys suffered from some cooling system failures, like faulty caps or broken-down pumps. But fewer of these are reported as time goes on, and the benefits (for most) outweigh the risks.

The addition of liquid cooling allowed Harley-Davidson to ever so slightly increase the compression ratio of the bike, from 10.2:1 to 10.3:1, with a small commensurate increase in power and torque.

Externally, Harley-Davidson has also redesigned the exterior of both bikes. The Street Glide’s fork-mounted batwing is sleeker and has more features to ensure clean air over the rider. Both bikes have upgraded lighting (full LED) with features that match the new fairings.

There are a couple of big updates on the tech front, too. The 2024 touring models both have huge 12.3-inch full-colour displays (configured to look like analogue displays), and also have ride-by-wire features including ride modes and cornering ABS/traction control (which they’ve had since the 2020 revision).

While liquid cooling is restricted to the Street Glide and Road Glide for now, I expect it’ll trickle down the line into the rest of the Big Twin line.

Reference — Manual for the Harley-Davidson Road Glide / Street Glide (2024)

The above maintenance schedule came from the manual for the Harley-Davidson Touring models for 2024, also referencing other information on forums.

Below you can see screenshots from the manual for the Road Glide and Street Glide for the 2024 model year.

You can download manuals and other info from Harley-Davidson directly here (login required).

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