Sprint Filter SM277P14 air filter
02 · Data & docs

The facts.

DescriptionThe whole story▼

Sprint Filter publishes a table of media, and the temptation with any table is to read across it. A retention percentage from one row, a flow figure from another, a fibre dimension from a third, all quietly attached to whichever element happens to be in the basket. Worth resisting — and worth being told which numbers really belong to the SM277P14.

Key Features

  • Two published figures for this medium: 14 microns of filtration and 1,800 litres per square metre per second of flow
  • Dry special nonwoven construction — a fibre mat, not a woven cloth, so no mesh or filament dimension applies to it
  • About twice the filtering area of the performance elements it sits alongside
  • Direct replacement in the standard airbox, with no modification and no remapping
  • Dry in service and dry when refitted; no oil is used on it at any stage
  • Cleaned and reused for as long as the motorcycle runs, warranted two years from purchase

Which numbers belong where

The percentages that circulate about these filters come from a comparison run on the woven polyester: 93.13 % of 100-micron particles retained by the P08, against 76.42 % for a four-layer oiled cotton element on the same test. Those describe the P08. There is no equivalent published percentage for the nonwoven, so none is quoted here and none should be inferred by scaling one figure off another. What is documented for this medium is the pair above, and that pair is what the decision rests on.

The comparison you can actually make

It is the one inside this airbox. Set against the P08 in the same housing, the P14 exchanges 80 microns for 14, and 5,050 litres per square metre per second for 1,800: more held back, less passed through, both stated by the manufacturer. Set against the paper panel that came out, it swaps a part with a replacement interval for a part with a cleaning procedure. What neither comparison supports is a power claim — a drop-in element does not make a standard ZT 350-X faster, and a fine medium is the one place in the range where you knowingly buy less flow.

Care and cleaning

The routine is compressed air from the clean side outward, sending the load away by the route it arrived on. Anything greasy comes free under lukewarm water with a mild detergent, rinsed until the water is clear. The SM277P14 then dries in ambient moving air, nowhere near a heat source or a flame, and is put back with the material bone dry. Sprint Filter's maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Catalogued for the Zontes ZT 350-X of 2020 to 2026, alongside eight more Zontes machines in the 250, 310 and 350 classes. Nine entries share this code; check yours against the year range.

DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
  • Zontes ZT 250-R (2019–2021)
  • Zontes ZT 310-R (2021–2023)
  • Zontes ZT 310-T (2021–2023)
  • Zontes ZT 310-X (2021–2023)
  • Zontes ZT 350-R (2020–2026)
  • Zontes ZT 350-T (2020–2026)
  • Zontes ZT 350-X (2020–2026)
  • Zontes ZT 350-GK (2020–2026)
  • Zontes ZT 350-V (2020–2026)
07 · Support

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08 · Paddock

Before you go.

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