I made up a checklist of what to look for when buying a used quad. However, I have a few stupid, but legitimate, questions on my part.
1) Where is the engine oil located? Yes, I know the engine, but will it be hard to get to, behind something, right on the side, what?
2) How do you take the seat off to check the airbox?
3) Will it be obvious to tell whether it's clean or not?
4) How can you tell if the spark arrestor has been removed?
5) Is there just engine oil in a 400EX, or will there be gear oil and fork seal fluid, also?

Sorry for sounding ignorant, but I figured I'd get less embarrassment here where my friends can't see me.