Enemy number 1: condensation
Counter-intuitive: a motorcycle covered carelessly rusts more than one left in the open air. Why? A waterproof plastic cover traps moisture: condensation forms underneath and stagnates on the metal. The right material breathes.
Choosing a cover
| Type | Use | Verdict |
|---|---|---|
| Plastic cover | Short-term emergency | ❌ Condensation, avoid for long storage |
| Breathable cover (outdoor) | Bike outside | ✅ Waterproof + breathable, essential |
| Indoor cover (soft fabric) | Garage | ✅ Dust-proof, breathable |
For a bike outside all winter, invest in a waterproof AND breathable outdoor cover, well-fitted and secured (wind will rip it off otherwise).
## Reduce humidity
- Ventilated space: a garage that breathes is better than a damp sealed box.
- Cardboard/board under the tyres: isolates from cold ground (source of condensation) and prevents flat-spotting.
- Humidity absorbers in a small enclosed space.
- Don't cover an engine that's still hot/damp: let it dry first.
