2024 Honda Rancher 420 Oil Filter Size. Outstanding oil filtration for honda trx420fa2 fourtrax rancher 4×4 at dct. An oil change on a trx 420 honda atv is standard maintenance, and an important way to keep your atv's engine healthy.

See stock sizes for this machine. Finding the best oil for your honda rancher 420 may seem like a daunting task at first;