I have a 2011 rancher 420 and I want to order a plow and winch fronm RM-ATV. The model they have closest is the Trx 500 Forman. I am assuming the frames are the same and should be able to mount right up?
General Motors is famous for using off the shelf parts on their newer models. Honda doesn't do this instead favoring to engineer each part for its own new model. Your best best if the winch manufacturer is still in business is to contact them.