For what it's worth, I have a 2004 RTV with 2500 hours on it. I purchased it new with the the fiberglass roof, work light, and water filter kits added. It's had regular maintenance done by myself.
The things I've done to modify/repair it other than routine maintenance (oil and filter changes, grease, etc.):
Installed the front one piece driveshaft kit when the OEM two piece driveshaft u-joints gave up the ghost.
Removed the water filter. It caused problems with fuel flow.
Replaced all 4 front boots (and while I was at it all the seals).
I'm about to replace the front struts - the shocks are shot.
Rebuilt the bed after horse manure got under the bedlinen and rotted it out. The new bed was sprayed and the fiberglass bed liner thrown away. The bed sides had rotted as well so replaced them while I was at it.
Reupholstered the front seat twice with heavier duty material.
Replaced the vent cap o-ring on the transmission.
Replaced the battery with an identical replacement.
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The tires are still the original OEM tires. The engine doesn't use any oil between oil changes.
The headlights are still the original bulbs. I've had to change out two bulbs in the work lighting kit.
You will enjoy your new machine. It looks like new. Mine is dirty, and missing decals, but it's reliable as gravity.