New 400ex

I am purchasing a new 400ex this week, and I wanted to get some general advice from anyone who has some to offer on the proper care and maintenance for it.

I’ve had/have a few fourwheelers, and I’m good with tools, but I bought them all used and they already have their odd scrapes and squeaks and issues. I’d like to do everything possible to take the best care of this new one so it lasts as long as possible, and stays in the best shape I can keep it in.

I do nearly all my riding in the sand pits, so in particular I want to make sure that I’m doing the proper preventative maintenance for an atv that sees a lot of dust and sand.

So does any have any suggestions for me on what I should do to keep it running smoothly? Things like, clean the air filter every X rides, etc.
My main concerns are:
-keeping the frame from getting rusty or damaged
-keeping the suspension from squeaking
-keeping the engine running smoothly with it’s original power
-keeping the plastics in as good condition as possible

Any and all advice would be greatly appreciated guys, thanks a lot!