
The facts.
DescriptionThe whole story▼
A bobber is sold on a sensation. Fat front tyre, low bars, an 853 cc transverse twin that shoves from just above idle and does not much care what happens at the top of the tachometer — the appeal is the shove, and the shove is felt rather than measured. That creates an unusual maintenance problem, because the V9 has no instrument that reports on the thing you actually bought. The Sprint Filter P08 PM138S is a way of protecting a quality that nothing on the bike will tell you is fading.
Key Features
- Dry polyester cloth: no oil is present when new and none is added later
- Calibrated 80-micron aperture; Sprint Filter publish 93.13 % retention at 100 microns
- Filtering surface around twice that of other performance panels for this box
- Direct exchange with the standard element; no cutting, no adapters, no reflash
- Cleaned and refitted indefinitely instead of being replaced at every service
- Two years of manufacturer cover from the purchase date
Nothing announces itself
A blocked fuel filter throws a code. A worn chain makes a noise. A slowly loading air panel does neither: the management system meters fuel against the air that actually arrives, so the mixture stays correct and the bike stays perfectly healthy while becoming, week by week, slightly less muscular in exactly the way that sold it. There is no warning light for character. The only defence is a schedule, and the only schedule worth having is one you will actually keep — which argues for a panel that is cleaned in the garage rather than one that requires an order first.
Low revs leave nowhere to hide
The other half of the argument is arithmetic. An engine spinning at nine thousand has time and momentum to work around a restricted intake; one pulling hard at two and a half thousand does not. Each cylinder takes a large, separate gulp, and whatever the panel withholds during that gulp is withheld from the only part of the rev range a bobber uses. Fitting the PM138S will not add torque — nothing dropped into a series airbox does — but it keeps the intake close to its designed resistance throughout the interval instead of only at the start of one.
Care and cleaning
Compressed air on the clean face, worked outwards, is the standard service and takes minutes. For anything stubborn, wash the panel in hand-warm water with a mild detergent and keep rinsing while the water still colours. Then dry it completely in still room air — never with a heat gun, never on a radiator, never near a flame, since warmth deforms the weave without leaving any visible sign. Refit it dry and untreated. The maker's maintenance sheet is filed under Downloads.
Fitment & Compatibility
Listed for the Moto Guzzi V9 Bobber built from 2016 to 2024. The same panel serves twenty-one machines across the V7 and V9 ranges and three BMW singles; see the Fitment tab for the detail.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- BMW F 650 CS Scarver (2001–2005)
- BMW G 650 Xcountry / Xmoto (2007–2010)
- BMW G 650 Xchallenge (2007–2011)
- Moto Guzzi Nevada Classic (2004–2007)
- Moto Guzzi Nevada Classic - Aquila Nera (2012–2013)
- Moto Guzzi Nevada S Anniversario (2012)
- Moto Guzzi V7 III Stone (2017–2020)
- Moto Guzzi V7 III Special (2017–2020)
- Moto Guzzi V7 III Racer (2017–2020)
- Moto Guzzi V7 III Milano (2017–2020)
- Moto Guzzi V7 III Anniversario (2017–2020)
- Moto Guzzi V7 II Racer ABS (2015)
- Moto Guzzi V7 II Special ABS (2015)
- Moto Guzzi V7 II Stone ABS (2015)
- Moto Guzzi V7 Racer (2012–2014)
- Moto Guzzi V7 Racer (2010–2011)
- Moto Guzzi V7 Special - Stone (2012–2014)
- Moto Guzzi V7 IV Stone (2021–2026)
- Moto Guzzi V7 IV Special (2021–2026)
- Moto Guzzi V9 Bobber (2016–2024)
- Moto Guzzi V9 Roamer (2016–2024)
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Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.