Ramsey is the subject of talks with Manchester United and Adams said: "Someone so young doesn't yet know what a cup final means. Without that pressure Ramsey can just go out and play with freedom. That could be very dangerous.
"We've been very difficult to beat this season - 22 clean sheets is a club record.
"Wembley is no place for losers. I will remind the team of that before we go out on to the pitch.
"It's not a day when you want to under-perform. I admit you need that element of luck and we've had ours along the way. But you don't win important matches unless you have that bit of quality.
"The people of Portsmouth and Cardiff are made up about this final. I'm going to make sure I enjoy every minute of it."