The facts.
DescriptionThe whole story▼
Sprint Filter lists SM297S for five machines: two generations of the X-Cape adventure bike, the Seiemmezzo STR and SCR, and the Calibro with its Bagger version. The STR is the naked among them. Bodywork, riding position and purpose differ completely across the five; the box that feeds the engine does not. That makes the standard P08 the common denominator of the whole platform, and the point at which its owners' choices begin to diverge.
Key Features
- Woven polyester used dry, 80 µm rating, fibres from 22 µm in diameter
- 5,050 l/m²/sec of flow according to the manufacturer
- 93.13 % of 100-micron particles retained, where four-layer oiled cotton holds 76.42 %
- Around twice the filtering surface of other performance filters
- Replaces the paper element in the series STR airbox with no modification or remap
- Never oiled, washable, built for the life of the bike and guaranteed for two years
Where the platform parts ways
The standard element is listed for all five. After that the list divides along the bodywork. The X-Cape models get a T12 for off-road dust and nothing else; the STR, the SCR and the Calibro get a P14 for dusty roads and the P08 F1-85 racing weave instead. In effect Sprint Filter is saying what each body is for. For the STR, a naked meant for roads, that leaves the P14 and the F1-85 as the alternatives, and the P08 sits between them: coarser than the P14, finer than the racing weave, and the default for a bike ridden on tarmac.
What the element does on a naked
A naked has no fairing to shape the air around the intake, and it is usually ridden where road grime collects: towns, ring roads, country lanes. The P08 copes with that, and because it is washed instead of thrown away, the resistance the engine breathes through returns to its starting point after every clean. That is the benefit, and the only one to expect. A filter in an unmodified airbox does not make a series Seiemmezzo stronger. If the roads you ride are routinely dusty, the P14 is the better element; for track days on a modified engine, the F1-85. For everything in between, this one.
Care and cleaning
Pull SM297S at the service and clean it with compressed air directed from the engine side outwards across the whole weave. Road grime that air will not move comes out in lukewarm water with a mild detergent; rinse until clear. Dry it at room temperature in a draught, since heat guns, radiators and open flames damage the fibres, and refit it dry and untreated. You will find the maintenance sheet in the Downloads tab.
Fitment & Compatibility
For the Moto Morini Seiemmezzo STR of 2023 and 2024. SM297S is listed for five machines: the STR, the Seiemmezzo SCR, the Calibro / Calibro Bagger and both X-Cape generations. The Fitment tab lists them all.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Moto Morini X-Cape 650 (2023–2024)
- Moto Morini X-Cape 700 (2025–2026)
- Moto Morini Seiemmezzo STR (2023–2024)
- Moto Morini Seiemmezzo SCR (2023–2026)
- Moto Morini Calibro / Calibro Bagger (2025–2026)
- Moto Morini Calibro 700 (2025–2026) · own page →
- Moto Morini Calibro Bagger 700 (2025–2026) · own page →
- Moto Morini Seiemmezzo SCR 650 (2023–2026) · own page →
- Moto Morini X-Cape 650 (2023–2024) · own page →
- Moto Morini X-Cape 700 (2025–2026) · own page →
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