When the Box Is the Problem

Which machine this is about — and where to go if it is a Sportsman

These are the two-up and utility-bed quads: a dump or cargo box over the rear axle instead of a rack, sold as a separate model rather than as an accessory. An owner arriving here has usually been comparing systems on footprint figures, which is the wrong axis for this problem — the constraint the manufacturer flags is the bodywork at the back of the machine, and footprint says nothing about it.

One thing first, because for a lot of readers it is a shorter route. A large share of the flagged rows are Polaris Sportsman variants, and ATVtracks.net publishes a Sportsman machine page listing what fits a Sportsman, cargo-box variants included. If your machine is a Sportsman, go there for the fitment and come back here for what the flag means.

For the Arctic Cat and Textron box machines there is no dealer machine page to go to at all. The Arctic Cat applications and the Textron badge years carry the application detail for them.

What the flag says, and what it does not

The condition string is Vehicle with cargo box. Matched against the legend printed at the head of Camso’s own application guide it is remark H, and the legend is the entire published definition:

A* Certain rectriction apply
B* Suspension lift kit required
C* Temporary body parts removal
E* Important speed reduction
F* No compliance with accessories
G* Permanent interference
H* Vehicle with cargo box
J* CVT/AIR intake vent kit recommanded
K* Temporary vehicule modification
Minor modification and light interference are possible on any modelCamso ATV/UTV Track System Application Guide, August 2026 revision, remarks legend, read 2026-09-26. Published as a PDF; spellings are Camso’s own.

Read it precisely. The flag is a description of the vehicle, not a description of a consequence: it says this machine has a cargo box. It does not say what the box interferes with, whether the box has to come off, whether it has to stay empty, whether a load limit changes, or whether anything about the install differs at all.

Camso publishes no clearance figure, no box-height limit, no load statement and no procedure against these rows, so ask the dealer what comes off your machine before you order. What you can establish yourself is the geometry: a cargo box sits over the rear axle, and a rear track unit is taller and longer than the wheel it replaces, so the gap to look at is between the underside of the box and the top of the rear unit, through the whole of the suspension travel rather than with the machine standing still. There is a section further down on measuring it.

Every row that carries it

Every flagged row, with every condition printed against it rather than only the box one. Find your make, then your model year.

One feature of the set: this flag never appears beside another condition. Every row carrying it carries it alone, so there is no second string in the catalogue that qualifies it, narrows it or explains it.

Nearly all of it is published by one system

Every one of the 18 applications above is published by X4S, and 17 of them by that system alone. Across the whole set there are only 2 distinct combinations of systems.

Both of the systems involved are Camso’s, so this is not one manufacturer being more forthcoming than another — it is one document’s rows. Camso publishes nothing stating why the flag concentrates where it does, and from the outside a real difference between the systems, a difference in which machines each was published for and an artefact of how the guide was compiled all look the same.

So use the pattern as a question, not a verdict: if you are looking at a box machine and the flag is on one system’s row and not the other’s, ask the fitment desk what accounts for the difference on that specific machine, and treat the absence on the other row as an unfilled field rather than an all-clear.

You cannot always tell a flagged machine from the row title

2 of the flagged rows carry no box designation in the title at all — 700 Sportsman MV7 (2005-2006) and 850 Sportsman WV850 HO (2014). The rest announce themselves with a model designation the manufacturers use for the bodystyle, which is all the last column of the first table reports: whether the words TBX or X2 appear in the title. Nobody publishes a bodystyle field, so those 2 rows are why the title cannot be trusted to tell you.

The practical consequence: searching the catalogue for a bodystyle will not reliably find the machines flagged for that bodystyle. The flag lives on a row, the row is titled the way the manufacturer titled it, and matching the two is work somebody has to do by hand.

The same problem runs in the other direction. 1 row whose title carries a box designation is flagged for something else entirely rather than for the box:

So one nameplate can carry the box flag on one model-year split and a different flag on another, and the flag that moves is not necessarily the one a buyer would predict. The flag belongs to the row, not to the nameplate, and the model year is what selects the row — so search your year, not your model name.

The other manufacturer publishes these machines and flags nothing

Matching the same box designations across the whole catalogue gives 32 applications for box machines from these makes. 15 of them are Commander WS4 rows, and 0 of those carry a published condition.

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.

733 Commander WS4 records exist in the catalogue and the remarks field is empty on every one of them, while 19 records carry this particular flag, not one of which is a Kimpex row. An owner of a box quad reading a flagged Camso row beside an unflagged Commander row is not looking at two assessments of the same machine. They are looking at one assessment and one blank.

No row carrying this flag is a Commander WS4 row — and since the condition field is empty on every Kimpex row in the catalogue, that follows from the empty field rather than from anything Kimpex has published about box machines. If you are comparing the two systems on a box machine, the flag is not the axis to compare them on: put the same question to the fitment desk for both.

What to measure on your own machine

Since nobody publishes the clearance, the tape is the only way to know what you are dealing with. Twenty minutes with the machine on level ground gets you numbers the fitment desk can work with, and gets them before the kit is in a box in your garage.

1. Write down the machine to the model year, and whether the box is the factory one. A replacement or aftermarket bed changes every figure below.
2. Measure the gap between the underside of the box and the top of the standard rear tyre, on level ground, unloaded, and note the tyre pressure. Without the pressure you cannot repeat the measurement later or compare it with anybody else’s.
3. Note the reference points you used — a bolt head, a seam, the edge of the bed — so the second measurement comes off the same two places.
4. Think in travel, not in static height. The closest approach between a track unit and the bodywork happens somewhere in the suspension’s arc, not with the machine sitting still, so ask the desk what the rear unit’s tallest point is and where in the travel it gets there.
5. Check the box itself, not just the clearance: whether it opens, dumps and latches, and what it fouls on if the rear of the machine sits higher.
6. Do it again with a load in the box if you carry one. A measurement taken empty describes an empty machine, and a bed full of firewood is the load case you actually ride.

Take those numbers, and a photograph of the back of the machine from the side at wheel height, to whoever is quoting you. A flagged row plus a measured gap is a specific question; a flagged row on its own is a shrug.

What to ask before ordering

• What the box changes about this install on this model year, and whether the answer is Camso’s or the shop’s own. Both are worth having; they are not the same claim.
• Whether the box still opens, dumps and latches with the system fitted, and whether anything has to come off first.
• Whether carrying a load changes the answer, and whether there is a stated limit. Nobody publishes one, so if a figure is offered, ask where it came from.
• On a machine where one system’s row is flagged and another’s is not, what accounts for the difference on that machine. Treat the unflagged row as an unfilled field until somebody says otherwise.
• Which row your model year actually falls in. The flag moves between year splits on the same nameplate, so the year is what selects it — measuring your own bolt pattern is the other fact the fitment desk will ask for.