Dirt Bike Off-Season Storage & Winterizing Guide (2026)
How you store a dirt bike over the off-season decides what kind of spring you have — first-kick starts and clean fuel, or a gummed-up carb and a dead battery. Winterizing takes an hour and a few cheap supplies. Here’s the checklist.
Fuel: the #1 storage killer
Stale fuel varnishes carbs and clogs jets — the most common spring headache. Add fuel stabilizer, run the bike a few minutes to get treated fuel through the system, then either fill the tank (to limit condensation) or drain the carb float bowl. Two-stroke pre-mix and ethanol fuel go bad fastest, so stabilizer matters most for them.
Battery: keep it on a tender
A battery left to sit will self-discharge and may not recover. Put it on a battery tender/maintainer for the off-season (or pull it and store it somewhere cool and dry on a tender). This single step saves the most riders a dead battery in spring.
Protect metal & moving parts
Wash and fully dry the bike, then lube the chain and spray a corrosion inhibitor on bare metal. Air up the tires to storage pressure and ideally get the wheels off the ground with a stand so the tires don’t flat-spot. Plug the exhaust and airbox to keep critters out, and cover the bike to keep dust and moisture off.
Chain lube · Corrosion inhibitor spray · Dirt bike cover
Spring wake-up
Reinstall the charged battery, remove the exhaust/airbox plugs, check tire pressure, top off fresh fuel, and do a quick once-over per our maintenance guide. Then go find an open track on the MWR directory.
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Common questions
How do I store a dirt bike for winter?
Add fuel stabilizer and run it through (or drain the carb), put the battery on a tender, wash and dry the bike, lube the chain, get the tires off the ground or aired up, plug the exhaust and airbox, and cover it. The whole job takes about an hour.
Should I leave fuel in my dirt bike over winter?
Either fill the tank with stabilized fuel to limit condensation, or drain the carb float bowl. The key is treating any fuel left in the system with stabilizer so it doesn't varnish the carburetor — especially important for ethanol fuel and two-stroke pre-mix.
Will my dirt bike battery die over winter?
A battery left sitting will self-discharge and may not recover. Keep it on a battery tender/maintainer through the off-season to avoid a dead battery in spring.
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