LS2 Pinlock 120 MaxVision XLT Insert DKS433 – for FF901 Advant X
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Genuine Pinlock® 120 MaxVision™ XLT anti-fog insert, LS2 part 800400027, Pinlock reference DKS433. This is the lens supplied with the FF901 Advant X, sold separately as a replacement — because the insert wears out long before the visor does.
Three parts of the name each mean something. 120 is Pinlock's highest optical class: the lens holds more water vapour in its moisture-absorbing layer before it saturates, which is what determines how long you can sit at traffic lights on a cold morning before the screen goes. MaxVision means the lens reaches the edges of the aperture instead of leaving a visible frame across your field of view. XLT is the extra-large cut, made for this visor and not interchangeable with the DKS521 or DKS147 lenses used on other LS2 helmets.
How it works is worth knowing, because it explains how to look after it. The insert seals against the visor with a silicone bead, trapping a thin layer of air between the two — the same principle as double glazing. The inner surface is a hygroscopic film that absorbs condensation rather than repelling it. Both parts have a service life: the silicone hardens and the absorbent layer eventually saturates permanently, usually after two to three seasons of daily use. Never wipe the inner face dry; rinse it and let it drip.
Fitting takes a minute. Flex the visor gently outwards, drop the lens onto the eccentric pins, release. If the seal is not even all round, rotate the pins a few degrees — that is what they are eccentric for.
Fits
- LS2 FF901 Advant X Carbon
- LS2 FF901 Advant X
Specification
- Type — Pinlock® 120 MaxVision™ XLT
- Pinlock reference — DKS433
- Optical class — 120 — Pinlock's highest
- Coverage — MaxVision, edge to edge
- Seal — silicone bead, eccentric pin mounting
- Part number — 800400027
| Type | Pinlock® 120 MaxVision™ XLT |
|---|---|
| Pinlock reference | DKS433 |
| Optical class | 120 — Pinlock's highest |
| Coverage | MaxVision, edge to edge |
| Seal | silicone bead, eccentric pin mounting |
| Part number | 800400027 |
- LS2 FF901 Advant X Carbon
- LS2 FF901 Advant X
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// LS2
LS2 Pinlock 120 MaxVision XLT Insert DKS433 – for FF901 Advant X

Tech specs
- Type
- Pinlock® 120 MaxVision™ XLT
- Pinlock reference
- DKS433
- Optical class
- 120 — Pinlock's highest
- Coverage
- MaxVision, edge to edge
- Seal
- silicone bead, eccentric pin mounting
- Part number
- 800400027
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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