The mounting bracket on the Brophy Aluminum Scissor Steps, part # AS24, is 25 inches long and 1-1/2 inches wide and should be placed 1/8 inch below the lowest part of the door on your RV for installation.
The steps I have that are made to bolt or weld onto the trailer frame are the Stromberg Carlson brand. They will only have single, double, and triple steps. I am including a link to a product page that will list all of the Stromberg Carlson steps I have available.
I also have the Outriggers... view full answer...
For your 2002 Yamaha Kodiak the Bulldog Winch mount part # BDW15128 has been confirmed as a fit so it would work great.
This would work well with the Superwinch Terra # SW1145220 that you also referenced. view full answer...