Winter Storage and Bringing It Back

Most storage damage is done by doing nothing — and by one well-meant habit that makes it worse.

A bike stored badly for one winter can need a battery, a carburettor clean or a fuel system flush, and a set of brake components. A bike stored well needs a battery check and a wash. The difference is about two hours of work — and avoiding one habit that a lot of people swear by and that does active harm.

Tools

• Battery maintainer (not a plain trickle charger)
• Fuel stabiliser
• Breathable cover
• Cleaning kit and a corrosion inhibitor
• Tyre gauge

The habit to stop: starting it every couple of weeks

Idling a bike for ten minutes once a fortnight is the most common storage "tip" and it is worse than leaving it alone.

A short idle never gets the engine or the oil properly up to temperature. Combustion produces water; a fully warmed engine drives it off, while a brief idle condenses it into the oil and the exhaust. You are adding moisture to the places you least want it, repeatedly, all winter.

It also takes a big slug out of the battery on each start and never fully replaces it at idle.

If you want to run it, RIDE it — long enough to get fully to temperature. Otherwise leave it alone and let the maintainer look after the battery.

Laying it up

FUEL: fill the tank. A full tank leaves little room for moist air, which is what corrodes a tank from the inside. Add a fuel stabiliser at the dose on the bottle and then run the engine a few minutes so treated fuel reaches the fuel system, not just the tank.

OIL: change it BEFORE storage, not after. Used oil carries acidic combustion products, and leaving them sitting against bearing surfaces for months is exactly the wrong way round. This is the single most valuable storage step and the one most often deferred.

BATTERY: fit a proper battery maintainer — one that monitors and floats, not an unregulated trickle charger that will cook the battery over months. Either leave it on the bike on a maintainer, or remove it and maintain it somewhere dry and not on a cold concrete floor.

TYRES: inflate to the recommended pressure or slightly above, and if you can, get the weight off them. A tyre left flat-spotted on cold concrete for months may never settle properly. Move the bike a few inches occasionally if it must stay on its wheels.

CLEAN IT FIRST. Road salt, bug residue and brake dust left on for months will etch paint and chrome. Wash, dry completely, and use a corrosion inhibitor on bare metal.

COVER: breathable, not a plastic sheet. Plastic traps condensation against the bike and does more harm than no cover at all.

Do NOT leave the bike with the brakes applied or a disc lock clamped on for months in a damp space — that is how pads bond to discs.

Bringing it back

Before anything else, look underneath for evidence of rodents. Chewed wiring and nests in the airbox are common and are best found before you turn a key.

Check tyre pressures and look for flat spots or cracking.

Check the battery voltage and charge properly if needed, rather than jump-starting and hoping.

Check brake operation before you rely on it — surface rust on discs is normal after storage and cleans off in the first few gentle stops, but a seized caliper or a pad bonded to a disc is not.

Check the oil level and look for water or a mayonnaise-like emulsion, which indicates moisture in the oil.

First ride: gently, somewhere you know, and long enough to get fully warm.

Parts for this job

Check fitment for your own model and year before ordering — add your bike and we will flag what fits.

Other Harley how-to guides

This guide covers procedure and judgement. Torque figures, fluid capacities, gaps and tension settings are specific to your model and year and must come from the factory service manual for your motorcycle — we deliberately do not print numbers we cannot stand behind for your bike. Independent aftermarket retailer, not affiliated with Harley-Davidson, Inc.