The Curt ATV Towing Starter Kit # C45038 may fit your 2018 Honda FourTrax Rancher though it is not designed as a specific fit for ATVs.
Does your Rancher ATV have a tongue like in the accompanying photo? If so it will simply bolt onto that tongue, which is what would be required for this to fit on your Honda. I took a look at a bunch of photos of this ATV and was unable to determine if it has the tongue but a quick glance at the rear of your ATV and you should be able to tell pretty quickly.
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The correct custom winch mount kit for your 2017 Honda FourTrax Rancher is part # BDW15114 if it has the independent suspension or part # BDW15181 if it has the solid axle.
With these mounts you can use winches such as # BDW15001 (1-horsepower and rated for 2000-lbs) or # BDW15002 (1.2-horsepower and rated for 3000-lbs). The Superwinch LT2000 winch 1220210 mounts with a 2-bolt pattern spaced apart 3.15-inches; at most you may need a drill a new hole in the mount to use this winch.
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