Is That an R4S?

The measurement that settles it

Identification usually has to happen without a decal, and it can. Camso published this system on a narrower track than anything else in its ATV range, and published the front and rear at the same width — which nothing else here does.

Camso ATV T4S and Camso X4Spublish the same pair as each other — verified against both Camso pages on 2026-09-26 — and Kimpex Commander WS4 also publishes a wider rear than front. So the discriminator is not the absolute width, which a tape laid across a mounted track measures badly. It is whether the front figure and the rear figure are the same.

Measure across the track itself rather than across the frame, on all four corners. Matching front and rear points at one system. Unequal rules that one out; separating the systems that remain is a different exercise, and the wheel bolt pattern is the faster next measurement — see measuring your own bolt pattern.

What Camso published, and where the sheet disagrees with itself

The system’s one-page product sheet is still served from Camso’s file host and is the only first-party specification document available for it. It carries 2 statements about machine size, and they are not the same statement:

designed for machines under 500 cc
300CC TO 500 CCCamso ATV R4S product sheet (PDF), camso.co, read 2026-09-26

The first appears in the headline paragraph and the second in the specification badge, on the same page of the same document. They are different claims: one sets a ceiling and no floor, the other sets both. A small quad below the lower figure is inside one statement and outside the other. Both are printed above because Camso printed both; confirm which one applies with Camso or a parts desk before ordering anything on the strength of it.

The rest of what the sheet publishes, quoted as printed:

Note that the front and rear figures differ on both length and lug height, so a front unit and a rear unit are not the same part — worth knowing before counting units in somebody’s shed.

Two things on that sheet are worth reading carefully. The sprocket note says the drive is “adjusted to prevent clutch and engine overload” — a statement about the machine the system was built around, not a performance claim. And the flotation claim, “ground pressure reduced by 50% vs. tires”, carries its own footnote on the same sheet: the calculation is based on a stated vehicle weight including the driver, and Camso says the result varies with weight, load and track model. The headline figure only means anything with that footnote attached to it.

Why the footprint figures do not compare across brands

The footprint figure is the one people want expressed as a fraction of a current system, and it is the one that will not carry the weight. Across the systems named above there are 3 different labels in use for it: Ground surface, Ground coverage, Flotation surface. Two of those are Camso’s own, on Camso’s own ATV systems.

Neither Camso page states that ground surface and ground coverage are measured the same way, and Kimpex does not state how its own figure relates to either. So a ratio between two of them is a number nobody published. If flotation is the reason you are asking, the figure that behaves consistently is lug height and track length on the units themselves, both in the table above.

A related gap, since it bears on which system an owner is comparing against: the Kimpex Commander WS4 product page publishes no displacement range at all, read 2026-09-26. Displacement figures in circulation for that system are retailer taxonomy rather than a manufacturer statement.

Out of production, and how that is visible

Four things are checkable, all read 2026-09-26:

• Camso’s current product site returns HTTP 404 for the R4S product path. The system is not in the published range.
• The legacy R4S product URL on Camso’s older host still resolves, but it resolves through a 301 chain to the Camso ATV T4S page. The destination is the current system, not an archive of the withdrawn one.
• Camso still serves an R4S owner’s manual for model year 2023 from its file host, so the manual for the system is still obtainable even though the product page is gone.
• The published serial reference lists R4S prefixes for model years 2017–2023 and stops. The product sheet quoted above carries its own PDF timestamp inside that span.

None of that is Camso announcing a discontinuation, and no discontinuation notice was found. It is the footprint a withdrawn product leaves. Stated precisely: Camso publishes no current R4S product page, and no current application for it.

No published application, and parts data all the same

There is no published application list for this system anywhere. Choosing the model in a track-system filter clears the selection immediately, and the serial selectors omit the R4S family as well, read 2026-09-26. So an owner working from a dropdown concludes the system has vanished.

The parts data did not go with it. The transfer computation still carries 2 conversion entries specific to this system, one per direction between rigid and independent rear suspension, matched against model years 2017–2023:

• Rigid to independent — family codes 6122, 6322, model years 2017–2023
• Independent to rigid — family codes 6122, 6322, model years 2017–2023

One detail there has no published explanation. Those entries match 6122 as well as the family code the serial reference publishes for this system, and the reference itself lists no prefix under 6122at all. An owner holding a plate that begins with that code has a number the lookup cannot resolve, and no manufacturer document accounts for it — so take that plate to the parts desk rather than to a selector. The serial-family page covers the same class of gap on the other Camso ATV family.

So the position for an owner with a working set is better than an empty dropdown suggests: diagrams and conversion hardware for the system are still documented. The diagram just has to be asked for rather than picked from a list. Send the photograph of the serial plate rather than a retyped number, say which of the two plate locations it came from, and give the family code and model year if the prefix resolves at all.

A set that is complete and running is a parts question, and usually a short one — slides, bushings and a rubber kit are what wear. A set missing whole units is a different question: Camso publishes no current product page for this system, so there is no published route to a replacement front or rear unit, and the realistic answers are a used unit or a different system.

If the set you are looking at is used

There is no published route to a replacement unit for this system, which makes completeness the first thing to check rather than condition. Count four units and check that two are fronts and two are rears — the sheet above publishes length and lug height separately for each, so a seller who has mixed them up is selling you three-quarters of a set.

• Lay a tape across the track on all four corners. Equal front and rear confirms the system; unequal means it is something else, and the figures in the first table say what.
• Photograph the serial plate, note which of the two plate locations it came from, and check the prefix falls inside model years 2017–2023— outside that span the reference publishes nothing for this family.
• Establish whether the mount kit is with it and which rear-suspension type it was fitted to. The conversion entries above exist because rigid and independent are different hardware.
• Ask what the system came off, but check the application rather than the displacement. The machine-size statements on the sheet contradict each other, and whether a given quad has a published application is a catalogue question.

If the machine is small and this system is gone

The system Camso built for small-bore machines is out of production; that is not the same as a small quad having no track option. Camso’s current ATV systems publish their own machine-size statements — Camso ATV T4S as 300 to 1000cc and Camso X4S as All-terrain 300 to 1000cc; Side-by-side 400 to 700cc, both read 2026-09-26— and whether a particular small machine has a published application is a catalogue question rather than a displacement one. What is and is not published for small machines is in Camso’s small-bore system is out of production, and the published applications by make are under machines.

If the system on the machine turns out not to be this one, the next thing to check is the serial family, where two generations of a different Camso system share one prefix: a 6622 serial is ambiguous.