Sprint Filter P08 Air Filter for Road & Track – Honda CB1100 (2013–2017) CM101S

The CB1100 is the odd machine on this fitment list, and not for the reason it looks it. It is air-cooled: no water jacket carries heat off to a radiator, so the engine sheds it into the air around it, including the air where the airbox sits. That changes nothing about how it runs, but it settles what belongs inside the housing. Anything wet in an intake behaves differently warm than it does cold. The Sprint Filter P08 has nothing wet about it — a woven polyester cloth, run dry from the day it goes in, with no film on it to soften, creep or migrate downstream.

Key Features

• One layer of woven polyester, used completely dry — no oil goes on it at any point
• 80 µm filtration at a flow rate of 5,050 l/m²/sec, the medium Sprint Filter specifies for road and track use
• Polyester thread starting at ø 22 microns; the openings are set by the weave, not pressed out of pulp
• Roughly twice the working cloth of a typical performance element, which is where the flow comes from
• Sits where the paper panel sat, with fuelling and ducting left as Honda built them
• Cleaned rather than consumed, with a Sprint Filter guarantee of two years

Why a dry element suits this engine

Oiled cotton filters do work, but they hand the owner a judgement call at every service: how much oil, and how evenly spread. Err generously and the surplus does not stay where it was put — warmth and vibration move it, and the tract behind the airbox of a fuel-injected motorcycle is the last place a film belongs. An air-cooled four keeps its surroundings warm by design — a poor argument for adding anything migratory to the intake and a good one for a medium with nothing to give up. The P08 has no dose to get right. It goes back in the way it came out of the sink: dry.

What it changes on a bike like this

Nothing dramatic; any description promising otherwise is selling something. A standard CB1100 will not pull harder for a filter — a big, softly tuned four spends its life in the middle of the rev range, nowhere near the point where the medium becomes the limiting part of the intake. What does change is smaller and lasts longer: intake restriction that starts lower and stays there between services, instead of climbing as a paper panel loads up. The flow ceiling was never the constraint here, so there is no case for trading filtration away to raise it.

Care and cleaning

Most of the time the CM101S needs only compressed air, held to the clean face and blown outwards, so the dirt leaves the way it arrived. After a wet or gritty spell, wash it in lukewarm water with mild washing-up liquid and rinse until the water runs clear. Let it dry in open air by itself: no hot air gun, no radiator, no flame near it — polyester and heat do not agree. It goes back in dry, with nothing sprayed on. Sprint Filter's maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Made for the airbox of the Honda CB1100 built from 2013 to 2017. Three machines share it: this one, the CB1300F of 2003 to 2026 and the CB1300 Super Four of 2001 to 2005. The full list is in the Fitment tab.