The facts.
DescriptionThe whole story▼
Sprint Filter numbers a part after the airbox it lives in, and this particular airbox is shared by six Zontes machines whose engines run from 125 to 200 cm³. The housing does not change anywhere across that spread, so the element inside it had to be drawn around the largest appetite on the list. The ZT 125-G1 sits at the opposite end of it. Whatever capacity the filter holds was specified for an engine that asks for more litres a minute than this one ever will, and the smallest machine in the group inherits the surplus without paying for it.
Key Features
- Polyester, woven in one layer and run without oil: 80 µm, 5,050 l/m²/sec
- Yarn of 22 µm diameter and upwards, with no coating applied at any stage
- Something near double the filtering area found in comparable sport filters
- Slots into the series airbox in place of the paper panel: nothing cut, nothing remapped
- 93.13 % of 100-micron particles held back, where four-layer oiled cotton measures 76.42 %
- Cleaned and reused across the whole service life of the motorcycle; warranty two years from purchase
Capacity the smallest engine never spends
Air demand rises with displacement, and the top of this fitment list asks for appreciably more of it every minute than the bottom does. Both draw through an opening of identical size. Sprint Filter answers that with area rather than a wider mesh — roughly double the surface of an ordinary performance element, pleated into a case that cannot be made bigger. On the 200 that area is being worked. Here it is headroom, and headroom is the reason the element asks nothing of the fuelling and gives nothing back on a dyno.
What actually improves
Output on an A1 machine is fixed by its type approval, not by the panel in its airbox, so nothing dropped into this case will make the ZT 125-G1 faster. What a paper cartridge really offers is not one restriction figure but a slope: lowest the morning it is fitted, highest the day somebody finally bins it, and silent at every point along the way. A washable weave has a floor instead of a slope. Blow it through and it is back where it began, which means this machine spends the bulk of its working life near the good end of the scale rather than drifting towards the far one unnoticed.
Care and cleaning
Compressed air aimed at the clean face and worked outwards is the entire routine — the dust leaves along the path it arrived by. Where the surface has gone greasy, warm water with a drop of mild detergent lifts it; rinse thoroughly, then set the element aside in open air until every part of it is dry. No heat gun, no radiator, no flame, nothing sprayed on afterwards: it returns to the case dry and bare. Instructions for the SM276S are filed under Downloads on this page.
Fitment & Compatibility
Catalogued for the Zontes ZT 125-G1, model years 2020 to 2026. Six machines in total carry this code, spread over three displacements, all built around the one airbox. Quote the element code and the year from your papers when ordering rather than the lettering on the side panel.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Zontes ZT 125-G1 (2020–2026)
- Zontes ZT 125-GK (2020–2026)
- Zontes ZT 125 (2020–2026)
- Zontes ZT 155G (2020–2026)
- Zontes ZT 155G SR (2020–2026)
- Zontes ZT 200 (2020–2026)
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