LS2 FF901 Advant X Top Air Vent Cover
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Genuine LS2 top air vent cover for the FF901 Advant X, part 800901AUC01. This is the outer trim piece that sits over the crown intake — distinct from the vent itself (part 800901AVU11 or AVU12, listed separately), which carries the slider and the ducting.
It is worth knowing which of the two you need. If the vent still opens and closes properly but the helmet has a scuffed or cracked panel on the crown, this cover is the part. If the slider has broken, jammed or gone missing, you want the vent assembly instead. Ordering the wrong one is the most common mistake on this particular helmet, because the two parts look similar in photographs and sit directly on top of one another.
Fitted from the outside with the liner in place. One part number covers both shell sizes.
Fits
- LS2 FF901 Advant X Carbon
- LS2 FF901 Advant X
Specification
- Part — outer cover for the top air vent
- Distinct from — the top air vent assembly (800901AVU11 / AVU12)
- Fits — all sizes
- Part number — 800901AUC01
| Part | outer cover for the top air vent |
|---|---|
| Distinct from | the top air vent assembly (800901AVU11 / AVU12) |
| Fits | all sizes |
| Part number | 800901AUC01 |
- LS2 FF901 Advant X Carbon
- LS2 FF901 Advant X
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// LS2
LS2 FF901 Advant X Top Air Vent Cover

Tech specs
- Part
- outer cover for the top air vent
- Distinct from
- the top air vent assembly (800901AVU11 / AVU12)
- Fits
- all sizes
- Part number
- 800901AUC01
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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