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Harley-Davidson · Harley-Davidson Evolution big twin (1984-1999)

Road Glide (1917 cc)

Library entry covers 1998-2025

19 factory 28 guideline

Published source

Harley-Davidson 2018 Maintenance Schedules, Table 2-1 Regular Service Intervals: Touring Models

Factory factory bulletin. Covers 2018 Touring models table (Milwaukee-Eight).

Open the source

47 items for a 2021 model, grouped by interval the way a factory chart is laid out.

How this bike is built (what the schedule is based on)

Engine cycle: Four-stroke
Engine lubrication: Dry sump (separate oil tank)
Oil filtration: Replaceable cartridge or spin-on filter
Valve gear: Hydraulic lifters (no routine clearance adjustment)
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Fuel injection
Cooling: Air / oil cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Separate gearbox oil
Clutch control: Hand lever, cable
Final drive: Toothed belt
Front suspension: Telescopic fork
Rear suspension: Swingarm, twin shocks
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Cast / alloy, tubeless
Sidecar: No sidecar

Maintenance schedule

2021 Harley-Davidson Road Glide (1917 cc)

On the road: every 200 mi

1 item

Check engine oil level

Pre-ride / on the road

Guideline

Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

On the road: every 300 mi

2 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline

Every 3,000 mi or 12 months

5 items

Check throttle cable(s) free play and return

Fuel and air

Guideline
Check steering head bearing adjustment

Front end

Guideline
Inspect fork seals, stanchions and fork boots

Front end

Guideline
Check footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Guideline
Check wheel bearings for play

Wheels and tires

Guideline

Every 4,000 mi or 12 months

2 items

Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 5,000 mi or 12 months

4 items

Change engine oil

Engine

Factory

Manual: Replace engine oil and filter. Factory: First 1,000 mi/1,600 km, then every 5,000 mi/8,000 km; annually if sooner.
Replace oil filter

Engine

Factory

Manual: Replace engine oil and filter. Factory: Replaced with the oil, every 5,000 mi/8,000 km or annually.
Inspect brake hoses; replace old rubber

Brakes

Factory

Manual: Inspect oil lines and brake system for leaks, contact or abrasion. Factory: Every service column; annually if sooner.
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Check front/rear tire pressure, inspect tread. Factory: Every service column; annually if sooner.

Every 5,000 mi

5 items

Inspect coolant hoses and clamps

Engine

Factory

Manual: Check engine coolant freeze point, inspect for leaks. Factory: Every service column (liquid-cooled heads where fitted).
Inspect drive belt, pulleys and tension

Final drive

Factory

Manual: Inspect and adjust drive belt and sprockets. Factory: Every service column.
Grease and check center / side stand and springs

Rear suspension and frame

Factory

Manual: Inspect and lubricate jiffy stand. Factory: Every service column.
Check brake pads and discs

Brakes

Factory

Manual: Inspect brake pads and discs for wear. Factory: Every service column, 1,000 mi then every 5,000 mi.
Lubricate control cables and lever pivots

Controls and cables

Factory

Manual: Check, adjust and lubricate brake and clutch controls. Factory: Every service column.

Every 6,000 mi or 12 months

5 items

Clean / inspect air filter

Fuel and air

Guideline

Mesh or oiled foam: clean and re-oil. Paper: blow out or replace. Some very early machines have no filter at all.
Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Check swingarm bushes for play

Rear suspension and frame

Guideline
Inspect rear shocks for leaks and damping

Rear suspension and frame

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

A dry speedo cable whips the needle and eventually kills the instrument.

Every 10,000 mi or 2 years

2 items

Compression test (or leak-down)

Engine

Guideline
Change gearbox oil

Primary and gearbox

Guideline

Every 12,000 mi or 2 years

3 items

Replace air filter element

Fuel and air

Guideline
Synchronize throttle bodies

Fuel and air

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 15,000 mi

1 item

Check spoke tension and wheel true

Wheels and tires

Factory

Manual: Check wheel spoke tightness (if equipped). Factory: At 1,000, 5,000, 20,000 mi then every 15,000 mi (24,000 km).

Every 20,000 mi or 4 years

1 item

Repack / replace wheel bearings

Wheels and tires

Guideline

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 25,000 mi or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 25,000 mi

1 item

Repack / replace steering head bearings

Front end

Factory

Manual: Inspect, lubricate and adjust steering head bearings. Factory: Disassemble, lubricate, inspect and adjust every 25,000 mi (40,000 km).

Every 30,000 mi or 2 years

1 item

Replace spark plugs

Engine

Factory

Factory: Every two years or 30,000 mi (48,000 km), whichever comes first.

Every 30,000 mi

1 item

Replace coolant

Engine

Factory

Factory: Every 30,000 mi (48,000 km).

Every 50,000 mi

3 items

Replace drive belt (wear or damage based)

Final drive

Guideline
Change fork oil

Front end

Factory

Manual: Rebuild front forks / replace fork oil. Factory: Disassemble, inspect, rebuild forks and replace fork oil every 50,000 mi (80,000 km).
Rebuild forks: seals, bushes, springs

Front end

Factory

Manual: Rebuild front forks. Factory: Every 50,000 mi (80,000 km), with fork oil.

Every 100,000 mi

1 item

Replace fuel filter

Fuel and air

Factory

Factory: Every 100,000 mi (161,000 km); more often in severe conditions.

Every 12 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Factory

Manual: Check battery, terminal torque and clean connections annually. Factory: Annually.

Every 2 years

4 items

Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Replace hydraulic clutch fluid

Primary and gearbox

Factory

Manual: Flush clutch system and replace DOT 4 clutch fluid. Factory: Every two years or sooner if moisture 3% or greater.
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Replace brake fluid

Brakes

Factory

Manual: Flush brake system and replace DOT 4 hydraulic brake fluid. Factory: Every two years or sooner if moisture content is 3% or greater; moisture checked each service.

Every 4 years

2 items

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.
Rebuild calipers and master cylinders (seals)

Brakes

Guideline

Every 6 years

1 item

Replace tires on age (regardless of tread)

Wheels and tires

Guideline

Guideline lines: Intervals here are general guidelines for the machine's era and layout, compiled for this app. They are not factory manual figures. Check your workshop manual, and edit any interval in the bike's Schedule tab.