Motorcycle Winter Storage Guide: Protecting Your Bike
Why Winter Storage Preparation Matters
A motorcycle left in a garage over winter without preparation will likely need significant work come spring. Fuel degrades in as little as 30 days. Battery self-discharge can kill a cell permanently. Coolant protection may be inadequate for the temperatures your garage reaches. Brake fluid absorbs moisture and loses effectiveness. And moisture-driven corrosion works quietly all winter on metal surfaces you can't see.
A thorough winter prep takes 2–3 hours. The alternative is a spring service bill that costs significantly more — and possibly a bike that won't start for the first ride of the season.
Step-by-Step Winter Storage Preparation
Step 1 — Final Wash and Dry
Wash the bike thoroughly — this removes road salt, which is aggressive on metal and particularly harmful to aluminium and brake components. Dry completely, including under the seat, around the suspension linkages, and inside the rear hugger. Any moisture trapped against metal surfaces will corrode over winter.
Step 2 — Change the Oil
Used engine oil is acidic — acids left in the engine over a storage period attack internal surfaces. Change the oil and filter immediately before storage, even if you're not at a service interval. Run the engine briefly to distribute fresh oil through the system before shutting it down for winter.
Step 3 — Fuel System
Modern ethanol-blended fuels absorb moisture and can leave varnish deposits in fuel injectors and carburettors over prolonged storage. Either fill the tank completely (to minimise air space and moisture absorption) and add a fuel stabiliser, or drain the tank and fuel system entirely. Fuel stabiliser is the easier option for fuel-injected bikes — add it to a nearly full tank, run the engine for 5 minutes to circulate it through the fuel system, then shut down.
Step 4 — Battery
Remove the battery and store it indoors if possible — cold temperatures accelerate self-discharge. Connect it to a maintenance charger (such as a CTEK or Optimate) that will keep it topped up over winter without overcharging. Never leave a battery sitting on concrete — store indoors for warmth and convenience.
Step 5 — Coolant
Check the coolant concentration with a hydrometer or refractometer — it should be mixed to protect to at least -25°C, ideally -35°C if you're in a region with hard winters. If concentration is low, drain partially and top up with neat coolant.
Step 6 — Brakes
Check brake fluid. DOT 4 fluid absorbs up to 3% of its weight in water per year — after two years of normal service, boiling point has dropped significantly. If fluid is overdue a change, do it before winter. Brakes that feel fine in summer can fade badly in spring if moisture content is high.
Step 7 — Tyres
Inflate tyres to the top of the recommended pressure range for storage. If possible, get the bike onto paddock stands so both wheels are off the ground — this prevents flat-spotting, which can occur when a tyre sits under load in one position for months. If stands aren't available, move the bike forward or back slightly every few weeks.
Step 8 — Protect Surfaces
Apply a motorcycle-specific protectant or ACF-50 corrosion inhibitor to the chassis, swingarm, and suspension components. Spray lightly on the chain and wipe off excess. Apply a light coat of Vaseline or protective grease to any exposed chrome or polished metal. Cover the exhaust outlet to prevent moisture and rodents from entering.
Step 9 — Use a Quality Cover
A breathable motorcycle cover is better than a non-breathable one — trapped moisture under an impermeable cover causes more corrosion than no cover at all. If storing outdoors (not ideal), use a cover with anti-flap ties and a UV-stabilised outer layer.
Protecting Your Accessories Over Winter
If your bike has aftermarket seat pads, foam comfort products, or gel inserts, consider removing them for winter storage — foam can absorb moisture in damp garages and takes longer to dry than the bike itself.
For crash protection components like frame sliders and crash bobbins, check for any cracking or UV degradation before storing — replace any compromised components before next season.
Explore our range of protective accessories in the Crash Protection collection and comfort products in the Seating collection.