Camso's Small-Bore ATV System Is Out of Production

What Camso published about the R4S

The R4S was the narrow one. Where the current ATV systems run eleven and a half inches of track at the front, the R4S ran eight at both ends, and the sheet said what that was for in its first line:

Get greater access for less. An all-season ATV track system designed for machines under 500 cc. Small but mighty, the Camso ATV R4S is versatile and offers great traction with better flotation. The ideal track system to carry lighter loads on flat land and slight slopes.Camso ATV R4S product sheet, camso.co, read 2026-09-26

The specification badge on the same sheet reads 300CC TO 500 CC, all-terrain. The published dimensions are a track width of 8 in. (203 mm) front and rear; lengths of 93.4 in. (2372 mm) front and 98.6 in. (2504 mm) rear; lug heights of 7/8 in. (22 mm) front and 1 in. (25 mm) rear; a flat profile at both ends; a lightweight powder coat steel frame; and sprockets described as adapted for smaller-bore ATVs and adjusted to prevent clutch and engine overload.

Two performance rows sit under that. The footprint is published as 1 333 sq. in. (0.86 m²) and labelled ground surface — not ground coverage, which is the label Camso uses for the same row on its current T4S page. Speed is published as a fraction rather than a percentage: maintained speed (average), 2/3. Both are Camso’s own words for quantities it labels differently on its current pages, so the R4S footprint figure and a current system’s ground coverage are not two measurements you can put side by side.

The sheet also carries the only flotation claim Camso makes in figures, and the footnote is the half that matters:

Ground pressure reduced by 50% vs. tires* — *May vary depending on vehicle weight, load carried and track system model. Calculations based on a 900 lb ATV (including driver).Camso ATV R4S track system product sheet, camso.co, read 2026-09-26

What happened to the product page

Three things were checked on 2026-09-26.

The current product URL returns 404. The legacy camso.co R4S product URL issues a 301and lands on the T4S page, which is a manufacturer pointing buyers of a withdrawn product at its replacement rather than at an explanation. And Camso’s ATV/UTV application guide dated August 2026 — the document that carries a row and a part number for every machine Camso publishes — has no R4S column and does not contain the string anywhere in its text.

What is still served is the documentation. The product sheet quoted above still returns 200. So does the owner’s manual, dated model year 2023, which carries the clearest statement of the system’s intended range that Camso ever published:

CAUTION: The ATV R4S Track System by Camso is designed for installation on vehicles 500 cc and under. Use of the System in applications other than those recommended by Camso may result in a warranty claim denial.Camso ATV R4S Track System owner’s manual, model year 2023, camso.co, read 2026-09-26

Camso publishes no end-of-production statement.There is no discontinuation notice, no final model year, no last-order date and no replacement mapping that we could find. “Out of production” is a reading of a 404, a redirect and an absent column rather than a quotation. The practical position is the same either way: plan around keeping an existing set running rather than around buying a new one, and confirm anything you need with a parts desk before you commit.

What it does not mean for a quad under 500cc

A withdrawn product is a withdrawn product. It is not a statement that nothing current fits a small machine, and the published record says otherwise. Camso’s T4S page publishes 300 to 1000cc as its machine rating, read on 2026-09-26 — a band whose floor is the same as the R4S floor. And the application catalogue holds 295 rows for machines with a published displacement under 500cc, over 198 distinct machine titles, 9 makes and model years 1986–2025. Every current system publishes some of them: WS4, T4S, X4S.

One caution on that count, because it cuts the other way. Displacement is not published on every row: 179 rows in the catalogue carry no cc value at all, so a machine can be under the ceiling and simply not be counted above. A displacement filter is a rough instrument here: look your machine up by make, model and year rather than by displacement, or the row that covers it can look as though it does not exist.

One more correction while the subject is machine ratings. The 300–1000cc figure that circulates for the Kimpex Commander WS4 is not a Kimpex-published rating. The WS4 product page carried no displacement range when it was read on 2026-09-26, only Applications: ATV only. The band is a retailer taxonomy, and it should not be cited as a manufacturer specification.

The oldest small-bore machines with a published application

These are the rows the withdrawn R4S is often assumed to have been the only route to: every machine below the displacement ceiling whose earliest published model year falls before 1995.

The pattern in that last column is not about the R4S at all. Camso’s small-bore applications reach back to model year 1986; the Kimpex rows for the same displacement class span 2002–2025. On the oldest machines Camso is frequently the only published route. Where no Kimpex row appears, that is no published Kimpex application — not a verdict that nothing can be made to work. If your machine is in that column, price the Camso route first and ask a dealer what the mount kit for your machine costs, because there may be nothing to compare it against.

Conditions on the small-bore rows

27 of the 295 rows below the ceiling carry at least one manufacturer condition. Camso publishes the flag and defines it in a legend at the head of each guide page. It does not publish what the condition means on the bench for a given machine — what has to come off, what interferes, or whether it goes back on. If your row carries a flag, ask the installing dealer what comes off your machine before you order, and get the answer before money changes hands. Documented installs are in Field Notes.

Kimpex publishes no per-application condition data at all: every Commander WS4 record in this catalogue has an empty remarks field. The absence of a WS4 entry below means nobody has published a condition for it — not that none exists. Camso is the only manufacturer here that publishes these flags, so this page is necessarily a Camso view of the catalogue.

Parts for a set you already have

A withdrawn system does not appear in a current listing marked unavailable. It simply is not there, which means browsing a track-system page is the wrong move — an R4S will not surface on one. Parts for it are reached the way parts for any Camso system are reached: through an exploded diagram, and the diagram is chosen by serial family and model year rather than by the machine the system is bolted to.

R4S serial prefixes cover model years 2017 through 2023, so the serial on the frame is what resolves a system in somebody’s shed to a diagram. If you are identifying one rather than buying parts for it, start at Is That an R4S? — eight-inch tracks at both ends are the fastest tell.

Which R4S kits are still orderable is not answered by any published document, and a surviving diagram means a part was once catalogued rather than that one is on a shelf. A parts desk is the only way to settle it, so go in prepared: photograph the serial decal before you call, and if the decal is gone, give the track width at both ends instead. Then ask three things — whether the part is in stock or has to be ordered, whether a current-system part supersedes it, and what the lead time is. Slides, bushings, sprockets and belts are what wear, and a season is short if one of them is a six-week wait.