How to Store Your Harley for Winter (2026 Complete Guide)

Step 1 – Fill the Tank and Add Fuel Stabilizer

Fill the fuel tank to near-full before storing. A partially full tank allows condensation to form on bare metal walls, which causes corrosion from the inside. Per the 2009 Touring Service Manual (p. 1-56), add a commercially available gasoline stabilizer following the manufacturer’s instructions.

For EFI-equipped Harleys (Twin Cam 2007+, Milwaukee-Eight 2017+), STA-BIL needs to cycle through the fuel injectors. Fill the tank, add stabilizer, then run the bike at operating temperature for at least 5-10 minutes so the treated fuel reaches the injectors and fuel lines.

Step 2 – Change the Oil While the Engine Is Warm

The official service manual sequence (2009 Touring, p. 1-56; 2013 Dyna, Section 1.24) specifies: run the motorcycle to operating temperature, stop the engine, drain the oil pan, install a new oil filter, and fill with the proper grade oil. Check transmission lubricant level at the same time.

Why change oil before storage rather than after? Used engine oil contains combustion acids and moisture. Storing a bike for 4-5 months with acidic oil accelerates internal corrosion on cylinder walls, cam bearings, and lifters. Fresh oil is a protective coating, not just a lubricant.

For Milwaukee-Eight engines (2017 and newer), Harley specifies the oil in the primary chaincase as a separate fluid – check and top up that as well. See our guide to best 20W-50 oil for Harley-Davidson for manufacturer-approved options.

Step 3 – Disconnect or Maintain the Battery

Harley-Davidson service manuals offer two options: remove the battery entirely and charge it externally, or leave it in the bike connected to a maintainer. Both are acceptable – the key is that the battery does not sit in a discharged state for months.

Per the 2009 Touring Service Manual (p. 1-56): “Charge the battery every other month if stored at temperatures below 60°F (16°C). Charge once a month if stored above 60°F (16°C).” A float-mode battery maintainer automates this entirely. The Battery Tender Plus (B00068XCQU) and NOCO GENIUS1 (B07W46BX31) both switch to float mode once the battery reaches full charge, preventing overcharge.

Critical safety note from the manual: always unplug the charger before connecting or disconnecting cables. Connecting with the charger powered on can cause a spark near the battery and risk explosion. For diagnosis help, see our guide on Harley-Davidson battery tender issues.

Step 4 – Fog the Cylinders (Long-Term Storage Over 60 Days)

The 2009 Touring Service Manual (p. 1-56) specifies: “Remove the spark plugs, inject a few squirts of engine oil into each cylinder and crank the engine 5-6 revolutions. Install spark plugs.” This distributes oil across the cylinder walls and valve stems, preventing rust from forming on bare metal during extended storage.

Dedicated fogging oil is more effective than plain engine oil for this application. STA-BIL Fogging Oil (B000H7CKAY) is formulated specifically for this purpose and works on both 2-cycle and 4-cycle engines – Harley V-Twins included. The HD service manual method: remove spark plugs, spray fogging oil directly into each cylinder, crank the engine 5-6 revolutions to distribute the oil, then reinstall the plugs. Some forum members also use the air-intake-while-idling method (spray into intake for 30 seconds before shutdown), but this is not an HD-specified procedure and carries a small hydrolock risk if too much oil pools in the cylinder – the spark plug method is the safer, manual-specified approach.

Step 5 – Check Tires and Support the Frame

The 2009 Touring Service Manual (p. 1-56) states: “If the motorcycle will be stored for an extended period of time, securely support the motorcycle under the frame so that all weight is off the tires.” This prevents flat spots – a deformation that occurs when a tire sits under load in the same position for months, particularly in cold temperatures where rubber hardens.

Inflation alone is not enough for extended storage. The HD manual’s recommendation is to use a paddock stand or frame stand to get tires off the ground completely. If stands are not available, a community practice is to add 5-10 PSI above the normal spec to reduce flat-spotting and move the bike slightly every 2-3 weeks to rotate the contact patch – note this is not the HD manual recommendation, which specifies lifting tires fully off the ground. See our Harley-Davidson tire pressure chart for baseline inflation specs by model.

For model-year-specific front and rear specs without table-hunting, our free tire pressure calculator returns your exact numbers instantly.

Step 6 – Block the Exhaust and Intake (Rodent Prevention)

This step isn’t explicitly in the HD service manual, but it is one of the most common sources of spring-season damage reported across r/Harley and HDForums. Mice and other rodents will use exhaust pipes and air intakes as nesting sites, and they will chew through wiring, rubber intake boots, and filter media.

Stuff the exhaust pipes with steel wool (not foam – rodents chew through it) and tape a cloth or block the air intake opening. Leave a visible reminder – a bandana tied to the handlebars or a note on the seat – so you don’t forget to remove them before starting. If your bike sits near known rodent entry points, dryer sheets around the frame have some anecdotal support from the forums, though steel wool remains the reliable physical barrier.

Step 7 – Inspect and Lubricate Controls and Drive Belt

Per the 2009 Touring Service Manual (p. 1-56): lubricate controls per the cable and chassis lubrication section, and inspect rear belt deflection and sprockets. The 2013 Dyna Service Manual adds: inspect the air cleaner filter element before sealing the bike up.

If you find the belt showing signs of wear – cracking on the sidewalls, missing teeth, or glazing – storage is the right time to address it rather than discovering the problem in spring. Check our voltage regulator symptoms guide to address any charging system issues before sealing up: Harley voltage regulator symptoms.

Step 8 – Wash, Wax, and Protect Chrome and Paint

The 2009 Touring Service Manual (p. 1-56) specifies: “Wash painted and chrome-plated surfaces. Apply a light film of oil to exposed unpainted surfaces.” Winter storage under a cover still exposes the bike to humidity, and any road grime, insect residue, or salt left on the surface will work against paint and chrome over months of contact.

Wash thoroughly, dry completely, and apply a coat of carnauba wax to painted surfaces. On chrome, apply a light coat of metal protectant or even motor oil to prevent surface oxidation. Pay particular attention to exposed fasteners, the primary cover, and the engine cases – these are the areas where surface rust typically appears first.

Tires in long-term storage are also vulnerable to age-related degradation – our guide to how long motorcycle tires last covers the storage age limits and DOT date code checks to run before the first spring ride.

Step 9 – Use a Breathable Storage Cover

The 2009 Touring Service Manual (p. 1-56) is explicit: “If the motorcycle is to be covered, use a material that will breathe, such as STORAGE COVER (Part No. 98716-87A) or light canvas. Plastic materials that do not breathe promote the formation of condensation, which leads to corrosion.”

This is one of the most common mistakes our research found in forum reports – riders using a tarp or plastic cover thinking it provides better weather protection. In an enclosed garage, a non-breathable cover traps condensation against the metal, causing corrosion faster than no cover at all. The Dowco Guardian WeatherAll Plus uses a multi-layer breathable fabric that meets the same specification as the HD factory cover.

Step 10 – Choose the Right Storage Location

The HD safety notice in the 2009 Touring Service Manual (p. 1-56) is direct: “Do not store motorcycle with gasoline in tank within the home or garage where open flames, pilot lights, sparks or electric motors are present.” Even with fuel stabilizer, gasoline fumes are flammable, and the risk increases in enclosed spaces with heating appliances.

Ideal: a detached garage with climate control. Acceptable: attached garage kept above freezing. Avoid: unheated sheds with extreme temperature swings, which stress rubber seals and battery chemistry. If outdoor storage is unavoidable, add a UV-resistant cover and consider a portable dehumidifier bag inside the cover. Also consider the security system – see our guide on the Harley-Davidson security system reset if you need to adjust security settings for winter.